Razor Helpers with ASP.NET MVC

Add a App_Code folder to your project and create a new CustomHelpers.cshtml file in it.

Add you custum helpers to the file, such as:

@helper Truncate(string input, int length)
{
   if(input.Lenght <= Lenght) {
      @input
   } else {
      @input.Substring(0, length)<text>...</text>
   }
}

The in order to use it in your razor views, you can do something like:

@CustomHelpers.Truncate(ViewBag.SomeMessage as string, 8)