// C# Extension Method
// Doc: https://csharp-extension.com/en/method/1002141/string-getnumericvalue
// @nuget: Z.ExtensionMethods
using System;
using System.Collections.Generic;
public class Program
{
public static void Main()
var myString = "EF6";
// C# Extension Method: String - GetNumericValue
var result = myString.GetNumericValue(2);
Console.WriteLine(result);
}