public static void Main()
string fullpath = "D:\\ASN\\Documents\\ENU\\LO\\ANL\\File\\05003ede-59bf-45c6-bb57-a6111e9f18e0\\linux-cheat-sheet.pdf";
string samplePath = "D:\\ASN\\Documents\\ENU\\LO";
var result = fullpath.Replace(samplePath, "").Split('\\')[1];
Console.WriteLine(result);