Break a full file name path into its separate components

Use System.IO.Path methods to get the path components

GetFileNameWithoutExtension() returns just the filename.

GetFileName() returns the filename including the extension.

GetExtension() returns just the extension.

GetDirectoryName() returns the folder path where the file is located.

var filenameNoExt = System.IO.Path.GetFileNameWithoutExtension(fileNamePath);
var filename = System.IO.Path.GetFileName(fileNamePath);
var extension = System.IO.Path.GetExtension(fileNamePath);
var dirname = System.IO.Path.GetDirectoryName(fileNamePath);

Break a full file name path into its separate components

How to break a file path into its various parts