public static void Main()
"ExportDetailed2ShowAllNo_2017_10_18_090622.csv",
"ExportDetailed2ShowAllNo_2017_10_19_090624.csv",
"ExportDetailed2ShowAllNo_2017_10_20_090612.csv",
"ExportDetailed2ShowAllNo_2017_10_21_072945.csv",
"ExportDetailed2ShowAllNo_2017_10_22_072919.csv",
"ExportDetailed2ShowAllNo_2017_10_23_072920.csv"
string todaysDate = DateTime.Now.ToString("yyyy_MM_dd");
.FirstOrDefault(stringToCheck => stringToCheck.Contains(todaysDate));
Console.WriteLine(match);