gistfile1.cs

public static string ExtensionFromContentType(string contenttype)
{
	string output = ".jpg";
	switch (contenttype)
	{
		case "image/gif":
			output = ".gif";
			break;
		case "image/png":
			output = ".png";
			break;
		case "image/jpg":
		case "image/jpeg":
		case "image/pjpeg":
			output = ".jpg";
			break;
		default:
			break;
	}
	return output;
}