Question

I’m getting inconsistent results with TrimEnd() under .NET 3.5. TrimEnd seems so simple to use, is there something I’m doing wrong here or is this a bug

Success case

  var foundvalue = "hosted.local.chatter.com";
  Console.WriteLine(foundvalue.TrimEnd(".chatter.com".ToCharArray()));
  // Result is "hosted.local" which is expected.

Failure case

 var foundvalue = "hosted.local.chattermailcom";
 Console.WriteLine(foundvalue.TrimEnd(".chattermailcom".ToCharArray()));
 // Result is "hosted" which is incorrect

Answer 1

Maybe you could write your own method for that:

public static class Extensions
{
  public static string RemoveEnd(this string strBefore, string substringToRemove)
  {
    if (!strBefore.EndsWith(substringToRemove))
      return strBefore;

    return strBefore.Remove(strBefore.Length - substringToRemove.Length);
  }
}