I've created a simple download manager with two textboxes and two buttons, one for download and one for specifying the path where i want to save the downloaded file... (folderBrowserDialog1.SelectedPath;) But when i specify the path that the file is going to be saved, it requires me to specify the type too like C:\Users\Me\Desktop\photo.jpg...When i leave it without \photo.jpg it shows C:\Users\Me\Desktop' is denied. I want that automatically to detect the extension and not to write \photo.jpg, bmp...everytime. Thanks.