System.Runtime.Serialization.CodeGenerator.InternalConvert C# (CSharp) Method

        private void InternalConvert(Type source, Type target, bool isAddress)
        {
            if (target == source)
                return;
            if (target.GetTypeInfo().IsValueType)
            {
                if (source.GetTypeInfo().IsValueType)
                {
                    OpCode opCode = GetConvOpCode(target.GetTypeCode());
                    if (opCode.Equals(OpCodes.Nop))
                        throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.Format(SR.NoConversionPossibleTo, DataContract.GetClrTypeFullName(target))));
                    else
                    {
                        if (_codeGenTrace != CodeGenTrace.None)
                            EmitSourceInstruction(opCode.ToString());
                        _ilGen.Emit(opCode);
                    }
                }
                else if (source.IsAssignableFrom(target))
                {
                    Unbox(target);
                    if (!isAddress)
                        Ldobj(target);
                }
                else
                    throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.Format(SR.IsNotAssignableFrom, DataContract.GetClrTypeFullName(target), DataContract.GetClrTypeFullName(source))));
            }
            else if (target.IsAssignableFrom(source))
            {
                if (source.GetTypeInfo().IsValueType)
                {
                    if (isAddress)
                        Ldobj(source);
                    Box(source);
                }
            }
            else if (source.IsAssignableFrom(target))
            {
                Castclass(target);
            }
            else if (target.GetTypeInfo().IsInterface || source.GetTypeInfo().IsInterface)
            {
                Castclass(target);
            }
            else
                throw System.Runtime.Serialization.DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.Format(SR.IsNotAssignableFrom, DataContract.GetClrTypeFullName(target), DataContract.GetClrTypeFullName(source))));
        }