private static Type InternalCreateType(IDataReader reader, IEnumerable <Type> implInterfaceTypes)
{
var guid = Guid.NewGuid().ToString("N");
var typeBuilder = new DynamicAssemblyBuilder("_Dynamic_" + guid).DefineType("$<>" + guid);
foreach (var type in implInterfaceTypes)
{
typeBuilder.ImplementInterface(type);
}
var length = reader.FieldCount;
var fields = new DynamicFieldBuilder[length];
for (var i = 0; i < length; i++)
{
var name = GetFieldName(reader.GetName(i));
var type = reader.GetFieldType(i);
var fieldBuilder = typeBuilder.DefineField("<>__" + name, type);
typeBuilder.DefineProperty(name, type).DefineGetSetMethods(fieldBuilder);
fields[i] = fieldBuilder;
}
var constructorBuilder = typeBuilder.DefineConstructor(new[] { typeof(IDataReader), typeof(IRecordWrapper) }, ilCoding: bc =>
bc.Emitter
.For(0, length, (e, i) =>
e.ldarg_0
.ldarg_2
.ldarg_1
.ldc_i4(i)
.callvirt(RecordWrapHelper.GetGetValueMethod(reader.GetFieldType(i)))
.stfld(fields[i].FieldBuilder))
.ret());
constructorBuilder.DefineParameter("reader");
constructorBuilder.DefineParameter("wrapper");
return(typeBuilder.CreateType());
}