// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002622/stringbuilder-substring

​

// @nuget: Z.ExtensionMethods

​

using System;

using System.Text;

public class Program

{

    public static void Main()

    {

        var test = new StringBuilder("FizzBuzzFizz",0);

​

        // C# Extension Method: StringBuilder - Substring

        Console.WriteLine(test.Substring(4));

        Console.WriteLine(test.Substring(8));

    }

}