C# String TrimEnd

Summary: in this tutorial, you will learn how to use the C# String TrimEnd() method to remove all the trailing white-space characters from a string.

Introduction to the C# String TrimEnd() method

The String TrimEnd() method allows you to remove all the trailing white-space characters from a string. It returns a new string with the trailing white spaces removed.

The following shows the syntax of the TrimEnd() method:

public string TrimEnd();Code language: C# (cs)

In this example, we use the TrimEnd() method to remove the trailing white spaces from the string "Hello, World! ";

using static System.Console;

var message = "Hello, World   ";
var result = message.TrimEnd();

Write(result);
Write('!');Code language: C# (cs)

Output:

Hello, World!Code language: C# (cs)

In this example, the message string contains trailing white spaces. We call the TrimEnd() method on the message string. The method returns a result string (trimmed) that has the trailing white spaces removed.

Note that the TrimEnd() method doesn’t change the original string but returns a new string.

The Unicode standard defines white-space characters. The TrimEnd() method removes any trailing and trailing characters that, when passed to the Char.IsWhiteSpace() method, returns true:

public static bool IsWhiteSpace (char c);Code language: C# (cs)

Using C# String TrimEnd() to remove the trailing instances of a character

The String TrimEnd() method has an overload that allows you to remove the trailing instances of a character from the current string:

public string TrimEnd(char trimChar);Code language: C# (cs)

In this syntax, the trimChar is a character to remove. The TrimEnd() method returns a new string with all the trailing trimChar removed.

For example, the following program uses the TrimEnd() method to remove the trailing (!) from a string:

using static System.Console;

var message = "Hello, World!";
var result = message.TrimEnd('!');

WriteLine(message);
WriteLine(result);Code language: C# (cs)

Output:

Hello, World!
Hello, WorldCode language: C# (cs)

Using C# String TrimEnd() to remove the trailing occurrences of a set of characters

The String TrimEnd() method has an overload that removes any trailing and trailing instances of specified characters from the current string:

public string TrimEnd (
   params char[]? trimChars
);Code language: C# (cs)

In this syntax, the trimChars is an array of characters to remove. Note that if the trimChars is null, the TrimEnd() method returns a new string with the trailing white spaces removed.

The following example uses the TrimEnd() method to remove the trailing characters ! and spaces from a string:

using static System.Console;

var message = "Hello, World! ***";

char[] trimChars = { '*', '!', ' ' };
var result = message.TrimEnd(trimChars);

WriteLine(result);Code language: C# (cs)

Output:

Hello, WorldCode language: C# (cs)

Summary

Use the C# String TrimEnd() method to remove all the trailing white spaces or a set of specified characters from a string.

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