/// <summary>
        /// Write a field
        /// </summary>
        protected override void WriteField(GeneratorContext ctx, FieldDescriptorProto obj, ref object state, OneOfStub[] oneOfs)
        {
            var name = ctx.NameNormalizer.GetName(obj);
            var tw   = ctx.Write($@"[global::ProtoBuf.ProtoMember({obj.Number}");

            if (name != obj.Name)
            {
                tw.Write($@", Name = @""{obj.Name}""");
            }
            var options = obj.Options?.GetOptions();

            if (options?.AsReference == true)
            {
                tw.Write($@", AsReference = true");
            }
            if (options?.DynamicType == true)
            {
                tw.Write($@", DynamicType = true");
            }

            bool isOptional = obj.label == FieldDescriptorProto.Label.LabelOptional;
            bool isRepeated = obj.label == FieldDescriptorProto.Label.LabelRepeated;

            OneOfStub oneOf = obj.ShouldSerializeOneofIndex() ? oneOfs?[obj.OneofIndex] : null;

            if (oneOf != null && oneOf.CountTotal == 1)
            {
                oneOf = null; // not really a one-of, then!
            }
            bool explicitValues = isOptional && oneOf == null && ctx.Syntax == FileDescriptorProto.SyntaxProto2 &&
                                  obj.type != FieldDescriptorProto.Type.TypeMessage &&
                                  obj.type != FieldDescriptorProto.Type.TypeGroup;


            string defaultValue             = null;
            bool   suppressDefaultAttribute = !isOptional;

            if (isOptional || obj.type == FieldDescriptorProto.Type.TypeEnum)
            {
                defaultValue = obj.DefaultValue;

                if (obj.type == FieldDescriptorProto.Type.TypeString)
                {
                    defaultValue = string.IsNullOrEmpty(defaultValue) ? "\"\""
                        : ("@\"" + (defaultValue ?? "").Replace("\"", "\"\"") + "\"");
                }
                else if (obj.type == FieldDescriptorProto.Type.TypeDouble)
                {
                    switch (defaultValue)
                    {
                    case "inf": defaultValue = "double.PositiveInfinity"; break;

                    case "-inf": defaultValue = "double.NegativeInfinity"; break;

                    case "nan": defaultValue = "double.NaN"; break;
                    }
                }
                else if (obj.type == FieldDescriptorProto.Type.TypeFloat)
                {
                    switch (defaultValue)
                    {
                    case "inf": defaultValue = "float.PositiveInfinity"; break;

                    case "-inf": defaultValue = "float.NegativeInfinity"; break;

                    case "nan": defaultValue = "float.NaN"; break;
                    }
                }
                else if (obj.type == FieldDescriptorProto.Type.TypeEnum)
                {
                    var enumType = ctx.TryFind <EnumDescriptorProto>(obj.TypeName);
                    if (enumType != null)
                    {
                        EnumValueDescriptorProto found = null;
                        if (!string.IsNullOrEmpty(defaultValue))
                        {
                            found = enumType.Values.FirstOrDefault(x => x.Name == defaultValue);
                        }
                        else if (ctx.Syntax == FileDescriptorProto.SyntaxProto2)
                        {
                            // find the first one; if that is a zero, we don't need it after all
                            found = enumType.Values.FirstOrDefault();
                            if (found != null && found.Number == 0)
                            {
                                if (!isOptional)
                                {
                                    found = null;             // we don't need it after all
                                }
                            }
                        }
                        // for proto3 the default is 0, so no need to do anything - GetValueOrDefault() will do it all

                        if (found != null)
                        {
                            defaultValue = ctx.NameNormalizer.GetName(found);
                        }
                        if (!string.IsNullOrWhiteSpace(defaultValue))
                        {
                            defaultValue = ctx.NameNormalizer.GetName(enumType) + "." + defaultValue;
                        }
                    }
                }
            }
            var typeName = GetTypeName(ctx, obj, out var dataFormat, out var isMap);

            if (!string.IsNullOrWhiteSpace(dataFormat))
            {
                tw.Write($", DataFormat = global::ProtoBuf.DataFormat.{dataFormat}");
            }
            if (obj.IsPacked(ctx.Syntax))
            {
                tw.Write($", IsPacked = true");
            }
            if (obj.label == FieldDescriptorProto.Label.LabelRequired)
            {
                tw.Write($", IsRequired = true");
            }
            tw.WriteLine(")]");
            if (!isRepeated && !string.IsNullOrWhiteSpace(defaultValue) && !suppressDefaultAttribute)
            {
                ctx.WriteLine($"[global::System.ComponentModel.DefaultValue({defaultValue})]");
            }
            WriteOptions(ctx, obj.Options);
            if (isRepeated)
            {
                var mapMsgType = isMap ? ctx.TryFind <DescriptorProto>(obj.TypeName) : null;
                if (mapMsgType != null)
                {
                    var keyTypeName = GetTypeName(ctx, mapMsgType.Fields.Single(x => x.Number == 1),
                                                  out var keyDataFormat, out var _);
                    var valueTypeName = GetTypeName(ctx, mapMsgType.Fields.Single(x => x.Number == 2),
                                                    out var valueDataFormat, out var _);

                    bool first = true;
                    tw = ctx.Write($"[global::ProtoBuf.ProtoMap");
                    if (!string.IsNullOrWhiteSpace(keyDataFormat))
                    {
                        tw.Write($"{(first ? "(" : ", ")}KeyFormat = global::ProtoBuf.DataFormat.{keyDataFormat}");
                        first = false;
                    }
                    if (!string.IsNullOrWhiteSpace(valueDataFormat))
                    {
                        tw.Write($"{(first ? "(" : ", ")}ValueFormat = global::ProtoBuf.DataFormat.{valueDataFormat}");
                        first = false;
                    }
                    tw.WriteLine(first ? "]" : ")]");
                    ctx.WriteLine($"{GetAccess(GetAccess(obj))} global::System.Collections.Generic.Dictionary<{keyTypeName}, {valueTypeName}> {Escape(name)} {{ get; }} = new global::System.Collections.Generic.Dictionary<{keyTypeName}, {valueTypeName}>();");
                }
                else if (UseArray(obj))
                {
                    ctx.WriteLine($"{GetAccess(GetAccess(obj))} {typeName}[] {Escape(name)} {{ get; set; }}");
                }
                else
                {
                    ctx.WriteLine($"{GetAccess(GetAccess(obj))} global::System.Collections.Generic.List<{typeName}> {Escape(name)} {{ get; }} = new global::System.Collections.Generic.List<{typeName}>();");
                }
            }
            else if (oneOf != null)
            {
                var defValue  = string.IsNullOrWhiteSpace(defaultValue) ? $"default({typeName})" : defaultValue;
                var fieldName = FieldPrefix + oneOf.OneOf.Name;
                var storage   = oneOf.GetStorage(obj.type, obj.TypeName);
                ctx.WriteLine($"{GetAccess(GetAccess(obj))} {typeName} {Escape(name)}").WriteLine("{").Indent();

                switch (obj.type)
                {
                case FieldDescriptorProto.Type.TypeMessage:
                case FieldDescriptorProto.Type.TypeGroup:
                case FieldDescriptorProto.Type.TypeEnum:
                case FieldDescriptorProto.Type.TypeBytes:
                case FieldDescriptorProto.Type.TypeString:
                    ctx.WriteLine($"get {{ return {fieldName}.Is({obj.Number}) ? (({typeName}){fieldName}.{storage}) : {defValue}; }}");
                    break;

                default:
                    ctx.WriteLine($"get {{ return {fieldName}.Is({obj.Number}) ? {fieldName}.{storage} : {defValue}; }}");
                    break;
                }
                var unionType = oneOf.GetUnionType();
                ctx.WriteLine($"set {{ {fieldName} = new global::ProtoBuf.{unionType}({obj.Number}, value); }}")
                .Outdent().WriteLine("}")
                .WriteLine($"{GetAccess(GetAccess(obj))} bool ShouldSerialize{name}() => {fieldName}.Is({obj.Number});")
                .WriteLine($"{GetAccess(GetAccess(obj))} void Reset{name}() => global::ProtoBuf.{unionType}.Reset(ref {fieldName}, {obj.Number});");

                if (oneOf.IsFirst())
                {
                    ctx.WriteLine().WriteLine($"private global::ProtoBuf.{unionType} {fieldName};");
                }
            }
            else if (explicitValues)
            {
                string fieldName = FieldPrefix + name, fieldType;
                bool   isRef = false;
                switch (obj.type)
                {
                case FieldDescriptorProto.Type.TypeString:
                case FieldDescriptorProto.Type.TypeBytes:
                    fieldType = typeName;
                    isRef     = true;
                    break;

                default:
                    fieldType = typeName + "?";
                    break;
                }
                ctx.WriteLine($"{GetAccess(GetAccess(obj))} {typeName} {Escape(name)}").WriteLine("{").Indent();
                tw = ctx.Write($"get {{ return {fieldName}");
                if (!string.IsNullOrWhiteSpace(defaultValue))
                {
                    tw.Write(" ?? ");
                    tw.Write(defaultValue);
                }
                else if (!isRef)
                {
                    tw.Write(".GetValueOrDefault()");
                }
                tw.WriteLine("; }");
                ctx.WriteLine($"set {{ {fieldName} = value; }}")
                .Outdent().WriteLine("}")
                .WriteLine($"{GetAccess(GetAccess(obj))} bool ShouldSerialize{name}() => {fieldName} != null;")
                .WriteLine($"{GetAccess(GetAccess(obj))} void Reset{name}() => {fieldName} = null;")
                .WriteLine($"private {fieldType} {fieldName};");
            }
            else
            {
                tw = ctx.Write($"{GetAccess(GetAccess(obj))} {typeName} {Escape(name)} {{ get; set; }}");
                if (!string.IsNullOrWhiteSpace(defaultValue))
                {
                    tw.Write($" = {defaultValue};");
                }
                tw.WriteLine();
            }
            ctx.WriteLine();
        }
        /// <summary>
        /// Write a field
        /// </summary>
        protected override void WriteField(GeneratorContext ctx, FieldDescriptorProto field, ref object state, OneOfStub[] oneOfs)
        {
            var name = ctx.NameNormalizer.GetName(field);
            var tw   = ctx.Write($"[global::ProtoBuf.ProtoMember({field.Number}");

            if (name != field.Name)
            {
                tw.Write($@", Name = @""{field.Name}""");
            }
            var options = field.Options?.GetOptions();

            if (options?.AsReference == true)
            {
                tw.Write(", AsReference = true");
            }
            if (options?.DynamicType == true)
            {
                tw.Write(", DynamicType = true");
            }

            bool isOptional = field.label == FieldDescriptorProto.Label.LabelOptional;
            bool isRepeated = field.label == FieldDescriptorProto.Label.LabelRepeated;

            OneOfStub oneOf = field.ShouldSerializeOneofIndex() ? oneOfs?[field.OneofIndex] : null;

            if (oneOf != null && !ctx.OneOfEnums && oneOf.CountTotal == 1)
            {
                oneOf = null; // not really a one-of, then!
            }
            bool explicitValues = isOptional && oneOf == null && ctx.Syntax == FileDescriptorProto.SyntaxProto2 &&
                                  field.type != FieldDescriptorProto.Type.TypeMessage &&
                                  field.type != FieldDescriptorProto.Type.TypeGroup;

            bool   suppressDefaultAttribute = !isOptional;
            var    typeName     = GetTypeName(ctx, field, out var dataFormat, out var isMap);
            string defaultValue = GetDefaultValue(ctx, field, typeName);

            if (!string.IsNullOrWhiteSpace(dataFormat))
            {
                tw.Write($", DataFormat = global::ProtoBuf.DataFormat.{dataFormat}");
            }
            if (field.IsPacked(ctx.Syntax))
            {
                tw.Write($", IsPacked = true");
            }
            if (field.label == FieldDescriptorProto.Label.LabelRequired)
            {
                tw.Write($", IsRequired = true");
            }
            tw.WriteLine(")]");
            if (!isRepeated && !string.IsNullOrWhiteSpace(defaultValue) && !suppressDefaultAttribute)
            {
                ctx.WriteLine($"[global::System.ComponentModel.DefaultValue({defaultValue})]");
            }
            WriteOptions(ctx, field.Options);
            if (isRepeated)
            {
                var  mapMsgType = isMap ? ctx.TryFind <DescriptorProto>(field.TypeName) : null;
                bool allowSet   = ctx.EmitListSetters;
                if (mapMsgType != null)
                {
                    var keyTypeName = GetTypeName(ctx, mapMsgType.Fields.Single(x => x.Number == 1),
                                                  out var keyDataFormat, out var _);
                    var valueTypeName = GetTypeName(ctx, mapMsgType.Fields.Single(x => x.Number == 2),
                                                    out var valueDataFormat, out var _);

                    bool first = true;
                    tw = ctx.Write($"[global::ProtoBuf.ProtoMap");
                    if (!string.IsNullOrWhiteSpace(keyDataFormat))
                    {
                        tw.Write($"{(first ? "(" : ", ")}KeyFormat = global::ProtoBuf.DataFormat.{keyDataFormat}");
                        first = false;
                    }
                    if (!string.IsNullOrWhiteSpace(valueDataFormat))
                    {
                        tw.Write($"{(first ? "(" : ", ")}ValueFormat = global::ProtoBuf.DataFormat.{valueDataFormat}");
                        first = false;
                    }
                    tw.WriteLine(first ? "]" : ")]");
                    if (ctx.Supports(CSharp6))
                    {
                        ctx.WriteLine($"{GetAccess(GetAccess(field))} global::System.Collections.Generic.Dictionary<{keyTypeName}, {valueTypeName}> {Escape(name)} {{ get; {(allowSet ? "set; " : "")}}} = new global::System.Collections.Generic.Dictionary<{keyTypeName}, {valueTypeName}>();");
                    }
                    else
                    {
                        ctx.WriteLine($"{GetAccess(GetAccess(field))} global::System.Collections.Generic.Dictionary<{keyTypeName}, {valueTypeName}> {Escape(name)} {{ get; {(allowSet ? "" : "private ")}set; }}");
                    }
                }
                else if (UseArray(field))
                {
                    ctx.WriteLine($"{GetAccess(GetAccess(field))} {typeName}[] {Escape(name)} {{ get; set; }}");
                }
                else if (ctx.Supports(CSharp6))
                {
                    ctx.WriteLine($"{GetAccess(GetAccess(field))} global::System.Collections.Generic.List<{typeName}> {Escape(name)} {{ get; {(allowSet ? "set; " : "")}}} = new global::System.Collections.Generic.List<{typeName}>();");
                }
                else
                {
                    ctx.WriteLine($"{GetAccess(GetAccess(field))} global::System.Collections.Generic.List<{typeName}> {Escape(name)} {{ get; {(allowSet ? "" : "private ")}set; }}");
                }
            }
            else if (oneOf != null)
            {
                var defValue  = string.IsNullOrWhiteSpace(defaultValue) ? (ctx.Supports(CSharp7_1) ? "default" : $"default({typeName})") : defaultValue;
                var fieldName = GetOneOfFieldName(oneOf.OneOf);
                var storage   = oneOf.GetStorage(field.type, field.TypeName);
                ctx.WriteLine($"{GetAccess(GetAccess(field))} {typeName} {Escape(name)}").WriteLine("{").Indent();

                switch (field.type)
                {
                case FieldDescriptorProto.Type.TypeMessage:
                case FieldDescriptorProto.Type.TypeGroup:
                case FieldDescriptorProto.Type.TypeEnum:
                case FieldDescriptorProto.Type.TypeBytes:
                case FieldDescriptorProto.Type.TypeString:
                    ctx.WriteLine($"get {{ return {fieldName}.Is({field.Number}) ? (({typeName}){fieldName}.{storage}) : {defValue}; }}");
                    break;

                default:
                    ctx.WriteLine($"get {{ return {fieldName}.Is({field.Number}) ? {fieldName}.{storage} : {defValue}; }}");
                    break;
                }
                var unionType = oneOf.GetUnionType();
                var cast      = field.type == FieldDescriptorProto.Type.TypeEnum ? "(int)" : "";
                ctx.WriteLine($"set {{ {fieldName} = new global::ProtoBuf.{unionType}({field.Number}, {cast}value); }}")
                .Outdent().WriteLine("}");

                if (ctx.Supports(CSharp6))
                {
                    ctx.WriteLine($"{GetAccess(GetAccess(field))} bool ShouldSerialize{name}() => {fieldName}.Is({field.Number});")
                    .WriteLine($"{GetAccess(GetAccess(field))} void Reset{name}() => global::ProtoBuf.{unionType}.Reset(ref {fieldName}, {field.Number});");
                }
                else
                {
                    ctx.WriteLine($"{GetAccess(GetAccess(field))} bool ShouldSerialize{name}()").WriteLine("{").Indent()
                    .WriteLine($"return {fieldName}.Is({field.Number});").Outdent().WriteLine("}")
                    .WriteLine($"{GetAccess(GetAccess(field))} void Reset{name}()").WriteLine("{").Indent()
                    .WriteLine($"global::ProtoBuf.{unionType}.Reset(ref {fieldName}, {field.Number});").Outdent().WriteLine("}");
                }

                if (oneOf.IsFirst())
                {
                    ctx.WriteLine().WriteLine($"private global::ProtoBuf.{unionType} {fieldName};");
                }
            }
            else if (explicitValues)
            {
                string fieldName = FieldPrefix + name, fieldType;
                bool   isRef = false;
                switch (field.type)
                {
                case FieldDescriptorProto.Type.TypeString:
                case FieldDescriptorProto.Type.TypeBytes:
                    fieldType = typeName;
                    isRef     = true;
                    break;

                default:
                    fieldType = typeName + "?";
                    break;
                }
                ctx.WriteLine($"{GetAccess(GetAccess(field))} {typeName} {Escape(name)}").WriteLine("{").Indent();
                tw = ctx.Write($"get {{ return {fieldName}");
                if (!string.IsNullOrWhiteSpace(defaultValue))
                {
                    tw.Write(" ?? ");
                    tw.Write(defaultValue);
                }
                else if (!isRef)
                {
                    tw.Write(".GetValueOrDefault()");
                }
                tw.WriteLine("; }");
                ctx.WriteLine($"set {{ {fieldName} = value; }}")
                .Outdent().WriteLine("}");
                if (ctx.Supports(CSharp6))
                {
                    ctx.WriteLine($"{GetAccess(GetAccess(field))} bool ShouldSerialize{name}() => {fieldName} != null;")
                    .WriteLine($"{GetAccess(GetAccess(field))} void Reset{name}() => {fieldName} = null;");
                }
                else
                {
                    ctx.WriteLine($"{GetAccess(GetAccess(field))} bool ShouldSerialize{name}()").WriteLine("{").Indent()
                    .WriteLine($"return {fieldName} != null;").Outdent().WriteLine("}")
                    .WriteLine($"{GetAccess(GetAccess(field))} void Reset{name}()").WriteLine("{").Indent()
                    .WriteLine($"{fieldName} = null;").Outdent().WriteLine("}");
                }
                ctx.WriteLine($"private {fieldType} {fieldName};");
            }
            else
            {
                tw = ctx.Write($"{GetAccess(GetAccess(field))} {typeName} {Escape(name)} {{ get; set; }}");
                if (!string.IsNullOrWhiteSpace(defaultValue) && ctx.Supports(CSharp6))
                {
                    tw.Write($" = {defaultValue};");
                }
                tw.WriteLine();
            }
            ctx.WriteLine();
        }
        /// <summary>
        /// Write a field
        /// </summary>
        protected override void WriteField(GeneratorContext ctx, FieldDescriptorProto field, ref object state, OneOfStub[] oneOfs)
        {
            var name = ctx.NameNormalizer.GetName(field);

            var tw = ctx.Write($"<Global.ProtoBuf.ProtoMember({field.Number}");

            if (name != field.Name)
            {
                tw.Write($@", Name := ""{field.Name}""");
            }
            var options = field.Options?.GetOptions();

            if (options?.AsReference == true)
            {
                tw.Write(", AsReference := True");
            }
            if (options?.DynamicType == true)
            {
                tw.Write(", DynamicType := True");
            }

            bool isOptional = field.label == FieldDescriptorProto.Label.LabelOptional;
            bool isRepeated = field.label == FieldDescriptorProto.Label.LabelRepeated;

            OneOfStub oneOf = field.ShouldSerializeOneofIndex() ? oneOfs?[field.OneofIndex] : null;

            if (oneOf != null && !ctx.OneOfEnums && oneOf.CountTotal == 1)
            {
                oneOf = null; // not really a one-of, then!
            }
            bool explicitValues = isOptional && oneOf == null && ctx.Syntax == FileDescriptorProto.SyntaxProto2 &&
                                  field.type != FieldDescriptorProto.Type.TypeMessage &&
                                  field.type != FieldDescriptorProto.Type.TypeGroup;

            bool suppressDefaultAttribute = !isOptional;
            var  typeName = GetTypeName(ctx, field, out var dataFormat, out var isMap);

            string defaultValue = GetDefaultValue(ctx, field, typeName);

            if (!string.IsNullOrWhiteSpace(dataFormat))
            {
                tw.Write($", DataFormat := Global.ProtoBuf.DataFormat.{dataFormat}");
            }
            if (field.IsPacked(ctx.Syntax))
            {
                tw.Write($", IsPacked := True");
            }
            if (field.label == FieldDescriptorProto.Label.LabelRequired)
            {
                tw.Write($", IsRequired := True");
            }
            tw.WriteLine(")> _");
            if (!isRepeated && !string.IsNullOrWhiteSpace(defaultValue) && !suppressDefaultAttribute)
            {
                ctx.WriteLine($"<Global.System.ComponentModel.DefaultValue({defaultValue})> _");
            }
            WriteOptions(ctx, field.Options);
            if (isRepeated)
            {
                var mapMsgType = isMap ? ctx.TryFind <DescriptorProto>(field.TypeName) : null;
                if (mapMsgType != null)
                {
                    var keyTypeName = GetTypeName(ctx, mapMsgType.Fields.Single(x => x.Number == 1),
                                                  out var keyDataFormat, out var _);
                    var valueTypeName = GetTypeName(ctx, mapMsgType.Fields.Single(x => x.Number == 2),
                                                    out var valueDataFormat, out var _);

                    bool first = true;
                    tw = ctx.Write($"<Global.ProtoBuf.ProtoMap");
                    if (!string.IsNullOrWhiteSpace(keyDataFormat))
                    {
                        tw.Write($"{(first ? "(" : ", ")}KeyFormat := Global.ProtoBuf.DataFormat.{keyDataFormat}");
                        first = false;
                    }
                    if (!string.IsNullOrWhiteSpace(valueDataFormat))
                    {
                        tw.Write($"{(first ? "(" : ", ")}ValueFormat := Global.ProtoBuf.DataFormat.{valueDataFormat}");
                        first = false;
                    }
                    tw.WriteLine(first ? "> _" : ")> _");

                    if (ctx.Supports(VB14))
                    {
                        ctx.WriteLine($"{GetAccess(GetAccess(field))} Readonly Property {Escape(name)} As New Global.System.Collections.Generic.Dictionary(Of {keyTypeName}, {valueTypeName})");
                    }
                    else
                    {
                        var fieldName = FieldPrefix + name;
                        ctx.WriteLine($"{GetAccess(GetAccess(field))} Readonly Property {Escape(name)} As Global.System.Collections.Generic.Dictionary(Of {keyTypeName}, {valueTypeName})").Indent()
                        .WriteLine("Get").Indent()
                        .WriteLine($"Return {fieldName}")
                        .Outdent().WriteLine("End Get").Outdent().WriteLine("End Property").WriteLine()
                        .WriteLine($"Private ReadOnly {fieldName} As New Global.System.Collections.Generic.Dictionary(Of {keyTypeName}, {valueTypeName})").WriteLine();
                    }
                }
                else if (UseArray(field))
                {
                    if (ctx.Supports(VB11))
                    {
                        ctx.WriteLine($"{GetAccess(GetAccess(field))} Property {Escape(name)} As {typeName}()");
                    }
                    else
                    {
                        var fieldName = FieldPrefix + name;
                        ctx.WriteLine($"{GetAccess(GetAccess(field))} Property {Escape(name)} As {typeName}()")
                        .Indent().WriteLine("Get").Indent().WriteLine($"Return {fieldName}").Outdent().WriteLine("End Get").Outdent()
                        .Indent().WriteLine($"Set(ByVal value as {typeName}())").Indent().WriteLine($"{fieldName} = value").Outdent().WriteLine("End Set").Outdent()
                        .WriteLine("End Property").WriteLine()
                        .WriteLine($"Private {fieldName} As {typeName}()").WriteLine();
                    }
                }
                else
                {
                    if (ctx.Supports(VB14))
                    {
                        ctx.WriteLine($"{GetAccess(GetAccess(field))} Readonly Property {Escape(name)} As New Global.System.Collections.Generic.List(Of {typeName})");
                    }
                    else
                    {
                        var fieldName = FieldPrefix + name;
                        ctx.WriteLine($"{GetAccess(GetAccess(field))} Readonly Property {Escape(name)} As Global.System.Collections.Generic.List(Of {typeName})").Indent()
                        .WriteLine("Get").Indent()
                        .WriteLine($"Return {fieldName}")
                        .Outdent().WriteLine("End Get").Outdent().WriteLine("End Property").WriteLine()
                        .WriteLine($"Private ReadOnly {fieldName} As New Global.System.Collections.Generic.List(Of {typeName})").WriteLine();
                    }
                }
            }
            else if (oneOf != null)
            {
                var defValue  = string.IsNullOrWhiteSpace(defaultValue) ? $"CType(Nothing, {typeName})" : defaultValue;
                var fieldName = GetOneOfFieldName(oneOf.OneOf);
                var storage   = oneOf.GetStorage(field.type, field.TypeName);
                ctx.WriteLine($"{GetAccess(GetAccess(field))} Property {Escape(name)} As {typeName}").Indent().WriteLine("Get").Indent();
                switch (field.type)
                {
                case FieldDescriptorProto.Type.TypeMessage:
                case FieldDescriptorProto.Type.TypeGroup:
                case FieldDescriptorProto.Type.TypeEnum:
                case FieldDescriptorProto.Type.TypeBytes:
                case FieldDescriptorProto.Type.TypeString:
                    ctx.WriteLine($"Return If({fieldName}.Is({field.Number}), CType({fieldName}.{storage}, {typeName}), {defValue})");
                    break;

                default:
                    ctx.WriteLine($"Return If({fieldName}.Is({field.Number}), {fieldName}.{storage}, {defValue})");
                    break;
                }
                ctx.Outdent().WriteLine("End Get");

                var unionType = oneOf.GetUnionType();

                ctx.WriteLine($"Set(ByVal value As {typeName})").Indent()
                .WriteLine($"{fieldName} = New Global.ProtoBuf.{unionType}({field.Number}, value)").Outdent().WriteLine("End Set");

                ctx.Outdent().WriteLine("End Property").WriteLine();

                ctx.WriteLine($"{GetAccess(GetAccess(field))} Function ShouldSerialize{name}() As Boolean").Indent()
                .WriteLine($"Return {fieldName}.Is({field.Number})").Outdent()
                .WriteLine("End Function").WriteLine()
                .WriteLine($"{GetAccess(GetAccess(field))} Sub Reset{name}()").Indent()
                .WriteLine($"Global.ProtoBuf.{unionType}.Reset({fieldName}, {field.Number})")
                .Outdent().WriteLine("End Sub");

                if (oneOf.IsFirst())
                {
                    ctx.WriteLine().WriteLine($"Private {fieldName} As Global.ProtoBuf.{unionType}");
                }
            }
            else if (explicitValues)
            {
                string fieldName = FieldPrefix + name, fieldType;
                bool   isRef = false;
                switch (field.type)
                {
                case FieldDescriptorProto.Type.TypeString:
                case FieldDescriptorProto.Type.TypeBytes:
                    fieldType = typeName;
                    isRef     = true;
                    break;

                default:
                    fieldType = typeName + "?";
                    break;
                }

                ctx.WriteLine($"{GetAccess(GetAccess(field))} Property {Escape(name)} As {typeName}").Indent()
                .WriteLine("Get").Indent();

                if (!string.IsNullOrWhiteSpace(defaultValue))
                {
                    ctx.WriteLine($"Return If({fieldName}, {defaultValue})");
                }
                else if (!isRef)
                {
                    ctx.WriteLine($"Return {fieldName}.GetValueOrDefault()");
                }
                else
                {
                    ctx.WriteLine($"Return {fieldName}");
                }

                ctx.Outdent().WriteLine("End Get").WriteLine($"Set(ByVal value As {typeName})").Indent()
                .WriteLine($"{fieldName} = value").Outdent().WriteLine("End Set").
                Outdent().WriteLine("End Property");

                ctx.WriteLine($"{GetAccess(GetAccess(field))} Function ShouldSerialize{name}() As Boolean").Indent()
                .WriteLine($"Return Not ({fieldName} Is Nothing)").Outdent()
                .WriteLine("End Function")
                .WriteLine($"{GetAccess(GetAccess(field))} Sub Reset{name}()").Indent()
                .WriteLine($"{fieldName} = Nothing").Outdent().WriteLine("End Sub");

                ctx.WriteLine($"Private {fieldName} As {fieldType}");
            }
            else
            {
                if (ctx.Supports(VB11))
                {
                    tw = ctx.Write($"{GetAccess(GetAccess(field))} Property {Escape(name)} As {typeName}");
                    if (!string.IsNullOrWhiteSpace(defaultValue))
                    {
                        tw.Write($" = {defaultValue}");
                    }
                    tw.WriteLine();
                }
                else
                {
                    var fieldName = FieldPrefix + name;
                    tw = ctx.WriteLine($"{GetAccess(GetAccess(field))} Property {Escape(name)} As {typeName}")
                         .Indent().WriteLine("Get").Indent().WriteLine($"Return {fieldName}").Outdent().WriteLine("End Get").Outdent()
                         .Indent().WriteLine($"Set(ByVal value as {typeName})").Indent().WriteLine($"{fieldName} = value").Outdent().WriteLine("End Set").Outdent()
                         .WriteLine("End Property").WriteLine()
                         .Write($"Private {fieldName} As {typeName}");
                    if (!string.IsNullOrWhiteSpace(defaultValue))
                    {
                        tw.Write($" = {defaultValue}");
                    }
                    tw.WriteLine();
                }
            }
            ctx.WriteLine();
        }