// C# Extension Method
// Doc: https://csharp-extension.com/en/method/1002081/string-left
// @nuget: Z.ExtensionMethods
using System;
public class Program
{
public static void Main()
string input = "OneTwoThree";
// C# Extension Method: String - Left
string newStr = input.Left(6);
Console.WriteLine(newStr);
}