How about Check.PropertiesEqual()?

///-------------------------------------------------------------------------------------
/// <summary>
/// Determine if the properties of two objects are equivelent.
/// </summary>
/// <remarks>Note that you don't need to use this if the argument you are validating
/// has an overloaded Equal() method (like string, etc...)</remarks>
/// <param name="args">Arguments</param>
/// <returns>true if Equivelent, false otherwise.</returns>
///-------------------------------------------------------------------------------------
public static bool PropertiesEqualChecker( ParameterCheckerEventArgs args )
{
   // Enumerate the properties of the expected object and verify the arguments match
   if ( args.ExpectedValue.GetType() != args.ArgumentValue.GetType() )
      return false;

   foreach ( PropertyInfo pi in args.ExpectedValue.GetType().GetProperties() )
   {
      // You would think there would be an easier way to do this!
      string expected = pi.GetValue( args.ExpectedValue, null ).ToString();
      string argument = pi.GetValue( args.ArgumentValue, null ).ToString();

      if ( expected != argument )
         return false;
   }

   return true;
}