public static Tuple <object, object> CopyMemberValue(
this MemberExpression memberExpression,
object source,
object destination)
{
object copiedValue = default(object);
var sourceValue = memberExpression.GetMemberValue(source);
if (sourceValue != null)
{
var type = sourceValue.GetType();
var typeInfo = type.GetTypeInfo();
if (!typeInfo.IsClass || sourceValue is string)
{
copiedValue = sourceValue;
SetValue(memberExpression, destination, copiedValue);
}
else
{
var destinationValue = memberExpression.GetMemberValue(destination);
if (destinationValue == null)
{
if (type.IsArray)
{
var sourceArray = (Array)sourceValue;
copiedValue = Activator.CreateInstance(type, new object[] { sourceArray.Length });
}
else
{
var constructor = typeInfo.DeclaredConstructors.First(e => e.GetParameters().Count() == 0);
copiedValue = constructor.Invoke(null);
}
}
else
{
copiedValue = destinationValue;
}
SetValue(memberExpression, destination, copiedValue);
}
}
return(new Tuple <object, object>(sourceValue, copiedValue));
}
