/// <summary>
        /// The message descriptor proto.
        /// </summary>
        /// <param name="totalLength">
        /// The total length.
        /// </param>
        /// <param name="md">
        /// The message descriptor.
        /// </param>
        private void DescriptorProto(uint totalLength, MessageDescriptor md)
        {
            intend++;

            while (totalLength != 0)
            {
                int type, no;
                var l = GetTypeAndFieldNo(out type, out no);
                ix += l;
                totalLength -= (uint)l;

                switch (no)
                {
                    case 1: // string name
                        {
                            uint length;
                            var ixl = GetVarint(out length);
                            ix += ixl;
                            totalLength -= (uint)ixl;
                            md.Name = GetString(length);
                            Write(string.Format("Type = {0}, F#= {1}, Length = {2}, Name = {3}", type, no, length, md.Name));
                            ix += (int)length;
                            totalLength -= length;
                            break;
                        }

                    case 2: // FieldDescriptorProto[] field
                        {
                            uint length;
                            var ixl = GetVarint(out length);
                            ix += ixl;
                            totalLength -= (uint)ixl;
                            Write(string.Format("Type = {0}, F#= {1}, Length = {2} - FieldDescriptorProto field", type, no, length));
                            var fd = new FieldDescriptor();
                            md.Fields.Add(fd);
                            FieldDescriptorProto(length, fd);
                            totalLength -= length;
                            break;
                        }

                    case 3: // DescriptorProto[] nested_type
                        {
                            uint length;
                            var ixl = GetVarint(out length);
                            ix += ixl;
                            totalLength -= (uint)ixl;
                            Write(string.Format("Type = {0}, F#= {1}, Length = {2} - DescriptorProto", type, no, length));
                            var msg = new MessageDescriptor();
                            md.NestedTypes.Add(msg);
                            DescriptorProto(length, msg);
                            totalLength -= length;
                            break;
                        }

                    case 4: // EnumDescriptorProto[] enum_type
                        {
                            uint length;
                            var ixl = GetVarint(out length);
                            ix += ixl;
                            totalLength -= (uint)ixl;
                            Write(string.Format("Type = {0}, F#= {1}, Length = {2} - EnumDescriptorProto", type, no, length));
                            var ed = new EnumDescriptor();
                            md.EnumTypes.Add(ed);
                            EnumDescriptorProto(length, ed);
                            totalLength -= length;
                            break;
                        }

                    case 5: // ExtensionRange[] extension_range
                        {
                            uint length;
                            var ixl = GetVarint(out length);
                            ix += ixl;
                            totalLength -= (uint)ixl;
                            Write(string.Format("Type = {0}, F#= {1}, Length = {2} - ExtensionRange", type, no, length));
                            var er = new MessageDescriptor.ExtensionRange();
                            md.ExtensionRanges.Add(er);
                            ExtensionRange(length, er);
                            totalLength -= length;
                            break;
                        }

                    case 6: // FieldDescriptorProto[] extension
                        {
                            uint length;
                            var ixl = GetVarint(out length);
                            ix += ixl;
                            totalLength -= (uint)ixl;
                            Write(string.Format("Type = {0}, F#= {1}, Length = {2} - FieldDescriptorProto extension", type, no, length));
                            var fd = new FieldDescriptor();
                            md.Fields.Add(fd);
                            FieldDescriptorProto(length, fd);
                            totalLength -= length;
                            break;
                        }

                    case 7: // MessageOptions options
                        {
                            uint length;
                            var ixl = GetVarint(out length);
                            ix += ixl;
                            totalLength -= (uint)ixl;
                            Write(string.Format("Type = {0}, F#= {1}, Length = {2} - MessageOptions", type, no, length));
                            if (md.Options == null)
                            {
                                md.Options = new MessageOptions();
                            }

                            MessageOptions(length, md.Options);
                            totalLength -= length;
                            break;
                        }

                    case 8: // OneofDescriptorProto[] oneof_decl
                        {
                            uint length;
                            var ixl = GetVarint(out length);
                            ix += ixl;
                            totalLength -= (uint)ixl;
                            Write(string.Format("Type = {0}, F#= {1}, Length = {2} - OneofDescriptorProto", type, no, length));
                            var od = new OneofDescriptor();
                            md.OneofDecl.Add(od);
                            OneofDescriptorProto(length, od);
                            totalLength -= length;
                            break;
                        }
                }
            }

            intend--;
        }
        /// <summary>
        /// The oneof descriptor proto.
        /// </summary>
        /// <param name="totalLength">
        /// The total length.
        /// </param>
        /// <param name="od">
        /// The oneof descriptor.
        /// </param>
        private void OneofDescriptorProto(uint totalLength, OneofDescriptor od)
        {
            intend++;

            while (totalLength != 0)
            {
                int type, no;
                var l = GetTypeAndFieldNo(out type, out no);
                ix += l;
                totalLength -= (uint)l;

                switch (no)
                {
                    case 1: // string name
                        {
                            uint length;
                            var ixl = GetVarint(out length);
                            ix += ixl;
                            totalLength -= (uint)ixl;
                            od.Name = GetString(length);
                            Write(string.Format("Type = {0}, F#= {1}, Length = {2}, Name = {3}", type, no, length, od.Name));
                            ix += (int)length;
                            totalLength -= length;
                            break;
                        }
                }
            }

            intend--;
        }