パス文字列から拡張子取得


- path (String)
[Missing <param name="path"/> documentation for "M:CFW.IO.FileSystem.GetExtension(System.String)"]

[Missing <returns> documentation for M:CFW.IO.FileSystem.GetExtension(System.String)]
[Missing <param name="path"/> documentation for "M:CFW.IO.FileSystem.GetExtension(System.String)"]
[Missing <returns> documentation for M:CFW.IO.FileSystem.GetExtension(System.String)]