Changing Class Attribute

Copy from Here: 

http://stackoverflow.com/questions/2160476/how-to-set-attributes-values-using-reflection

 AttributeCollection ac  = TypeDescriptor.GetAttributes(yourObj);

        foreach (var att in ac)
        {
            //DataEntityAttribute  -- ur attribute class name
            DataEntityAttribute da = att as DataEntityAttribute ;
            Console.WriteLine(da.field1);  //initially it shows MESSAGE_STAGING
            da.field1= "Test_Message_Staging";  
         }


         //Check the changed value
        AttributeCollection acc = TypeDescriptor.GetAttributes(yourObj);

        foreach (var att in ac)
        {
            DataEntityAttribute da = att as DataEntityAttribute ;
            Console.WriteLine(da.field1); //now it shows Test_Message_Staging
        }