C# .ToUpper()

In C#, the .ToUpper() method returns a new string with all the characters converted to uppercase. Numbers and symbols are not changed.

This method does not modify the original string, but instead, it creates a new string that contains the uppercase version of the original string.

Syntax

somestring.ToUpper()

This method will not change the input string.

Example

In the following example, originalString is the string being converted to uppercase, and uppercaseString is the new string that contains the uppercased characters. The original string remains unchanged:

using System;

class Program
{
  static void Main(string[] args)
  {
    originalString = "Hello World"
    string uppercaseString = originalString.ToUpper();

    Console.WriteLine(originalString);
    Console.WriteLine(uppercaseString);
  }
}

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This will output:

Hello World
HELLO WORLD

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Codebyte Example

The example below converts a given string to uppercase and stores this value in a new string variable named uppercaseString:

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