// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002021/fileinfo-ispathrooted

​

// @nuget: Z.ExtensionMethods

​

using System;

public class Program

{

    public static void Main()

    {

        string FileName = "folder\\subfolder\\test.txt";

        // C# Extension Method: FileInfo - IsPathRooted

        if(FileName.ToFileInfo().IsPathRooted())

        {

            Console.WriteLine("Path is rooted.");

        }

        else

        {

            Console.WriteLine("Path is not rooted.");

        }

    }

}