Swapping two strings in C# without using temporary variables

To swap two strings without using temporary variables, you can try the following code and logic.

Append the second string to the first string.

str1 = str1 + str2;

Set str1 to str2.

str2 = str1.Substring(0, str1.Length - str2.Length);

Now, the final step is to set str2 to str1 −

str1 = str1.Substring(str2.Length);

Example

using System;

class Demo {

   public static void Main(String[] args) {
      String str1 = "Brad";
      String str2 = "Pitt";

      Console.WriteLine("Strings before swap");
      Console.WriteLine(str1);
      Console.WriteLine(str2);

      str1 = str1 + str2;

      str2 = str1.Substring(0, str1.Length - str2.Length);
      str1 = str1.Substring(str2.Length);

      Console.WriteLine("Strings after swap");
      Console.WriteLine(str1);
      Console.WriteLine(str2);
   }
}

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