With StringBuilder, you can expand the number of characters in the string. String cannot be changed once it is created, but StringBuildercan be expanded. It does not create a new object in the memory.
Initialize StringBuilder.
StringBuilder str = new StringBuilder();
Let us see an example to learn how to work with StringBuilder in C#.
using System; using System.Text; public class Program { public static void Main() { StringBuilder str = new StringBuilder("Web World!!",30); str.Replace("World", "Arena"); Console.WriteLine(str); } }
Web Arena!!
Above the Replace() method of StringBuilder is used to to replace a string in C#.