The TrimEnd method removes from the current string all trailing characters that are in the trimChars parameter. The trim operation stops when the first character that is not in trimChars is encountered at the end of the string. For example, if the current string is "123abc456xyz789" and trimChars contains the digits from "1" through "9", the TrimEnd method returns "123abc456xyz".

Note
This method does not modify the value of the current instance. Instead, it returns a new string in which all trailing characters found in trimChars are removed from the current string.

The .NET Framework 3.5 SP1 and earlier versions maintains an internal list of white-space characters that this method trims if trimChars is nullNothingnullptra null reference (Nothing in Visual Basic) or an empty array. Starting with the .NET Framework 4, if trimChars is nullNothingnullptra null reference (Nothing in Visual Basic) or an empty array, the method trims all Unicode white-space characters (that is, characters that produce a true return value when they are passed to the Char..::.IsWhiteSpace method). Because of this change, the Trim()()() method in the .NET Framework 3.5 SP1 and earlier versions removes two characters, ZERO WIDTH SPACE (U+200B) and ZERO WIDTH NO-BREAK SPACE (U+FEFF), that the Trim()()() method in the .NET Framework 4 does not remove. In addition, the Trim()()() method in the .NET Framework 3.5 SP1 and earlier versions does not trim three Unicode white-space characters: MONGOLIAN VOWEL SEPARATOR (U+180E), NARROW NO-BREAK SPACE (U+202F), and MEDIUM MATHEMATICAL SPACE (U+205F).

The following example demonstrates how you can use the TrimEnd(array<Char>[]()[]) method to trim white space or punctuation marks from the end of a string.

Module TrimEnd
   Public Sub Main()
      Dim sentence As String = "The dog had a bone, a ball, and other toys."
      Dim charsToTrim() As Char = {","c, "."c, " "c}
      Dim words() As String = sentence.Split()
      For Each word As String In words
         Console.WriteLine(word.TrimEnd(charsToTrim))
      Next
   End Sub
End Module
' The example displays the following output:
'       The
'       dog
'       had
'       a
'       bone
'       a
'       ball
'       and
'       other
'       toys

using System;

public class TrimEnd
{
   public static void Main()
   {
      string sentence = "The dog had a bone, a ball, and other toys.";
      char[] charsToTrim = {',', '.', ' '};
      string[] words = sentence.Split();
      foreach (string word in words)
         Console.WriteLine(word.TrimEnd(charsToTrim));
   }
}
// The example displays the following output:
//       The
//       dog
//       had
//       a
//       bone
//       a
//       ball
//       and
//       other
//       toys

.NET Framework

.NET Framework Client Profile

Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference