// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002613/stringbuilder-extracttoken

​

// @nuget: Z.ExtensionMethods

​

using System;

using System.Text;

public class Program

{

    public static void Main()

    {

        int endIndex;

​

        // C# Extension Method: StringBuilder - ExtractToken

        Console.WriteLine(new StringBuilder(" ").ExtractToken());

        Console.WriteLine(new StringBuilder("123.4LU foreach").ExtractToken().ToString());

        Console.WriteLine(new StringBuilder("for foreach").ExtractToken().ToString());

        Console.WriteLine(new StringBuilder("custom foreach").ExtractToken().ToString());

        Console.WriteLine(new StringBuilder("z += 2").ExtractToken(2, out endIndex).ToString());

        Console.WriteLine(endIndex);

    }

}