using System;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        var input = "dotnet";

        // does not throw and returns "dotnet"

        var nameFromLinq = input.Take(10).ToArray();

        Console.WriteLine(nameFromLinq);

        // throws "Unhandled exception. System.ArgumentOutOfRangeException: Index and length must refer to a location within the string. (Parameter 'length')"

        var nameFromSubstring = input.Substring(0, 10);

        Console.WriteLine(nameFromSubstring);

        // throws "Unhandled exception. System.ArgumentOutOfRangeException: Index and length must refer to a location within the string. (Parameter 'length')"

        var nameFromRange = input[..10];

        Console.WriteLine(nameFromRange);

    }

}