using System;

using System.Linq.Expressions;

using System.Reflection;

public class Program

{

    public static void Main()

    {

        var source = new MyDto { Name = "bar" };

        var target = new MyBusinessObject { Name = "foo" };

        var hasChanged = target.Set(t => t.Name, source.Name);

        Console.WriteLine(hasChanged);

    }

}

​

public static class Mapper

{

    public static bool Set<TTarget, TValue>(this TTarget target, Expression<Func<TTarget, TValue>> targetProperty, TValue sourceValue)

    {

        var actualValue = targetProperty.Compile().Invoke(target);

        if (actualValue.Equals(sourceValue))

        {

            return false;

        }

        var property = (PropertyInfo)((MemberExpression)targetProperty.Body).Member;

        property.SetValue(target, sourceValue);

        return true;

    }

}

​

public class MyDto

{

    public string Name { get; set; }

}

​

public class MyBusinessObject

{

    public string Name { get; set;}

}