How to compare properties between two objects

If you want to stick with comparison via reflection you should not use != (reference equality which will fail most of comparisons for boxed results of GetProperty calls) but instead use static Object.Equals method.

Sample how to use Equals method to compare two object in your reflection code.

 if (!Object.Equals(
     item.GetValue(person, null),
     dto.GetType().GetProperty(item.Name).GetValue(dto, null)))
 { 
   diffProperties.Add(item);
 }