How to Fetch Application Path Files Find C# Code

How to Fetch Application Path Files Find C# Code
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string Apppath = Server.MapPath(".");
DirectoryInfo Dir1 = new DirectoryInfo(Apppath);
DirectoryInfo[] SubDir = Dir1.GetDirectories();

string Filecollections = "";
foreach (DirectoryInfo subDirfile in SubDir)
{
Filecollections = subDirfile.FullName+" " + subDirfile.Extension+ " " + subDirfile.LastWriteTime+ " " + subDirfile.Name;
}
Response.Write(Filecollections);