Create a file or folder if it doesn't exist in C#

CreateFile.cs

            string path = @"E:\FamilyBrowser\";
            string FullPath = @"E:\FamilyBrowser\Architecture\Annotation\Cable Tray\Fittings\Channel Horizontal Bend.rfa";

            // Extract file path info
            var newpath = FullPath.Replace(path, "");
            newpath = newpath.Replace(".rfa", "");
            newpath = path + @"IMG\" + newpath;
         
            // Store File Path Info
            var fileinfo = new System.IO.FileInfo(newpath + ".png");

            if  (!fileinfo.Exists)
                {
                    //Create directory if it doesn't exist
                    System.IO.Directory.CreateDirectory(fileinfo.Directory.FullName);
                 
                   //Then create the file here
                  
                 }