public void EmitConstructorBody(TypeBuilder typeBuilder, EmitGenerator gen, int ctorArgumentIndex, ref int memberParameterIndex)
{
var fieldType = DefineParameterField(typeBuilder, memberParameterIndex);
gen.LoadThis();
gen.LoadArgument(ctorArgumentIndex);
gen.LoadArrayElement(memberParameterIndex);
gen.CastAny(fieldType);
gen.StoreField(_paramField);
memberParameterIndex += 1;
}