Change desktop background C#

[DllImport("user32.dll", CharSet = CharSet.Auto)]
private static extern Int32 SystemParametersInfo(UInt32 uiAction, UInt32 uiParam, String pvParam, UInt32 fWinIni);
private static UInt32 SPI_SETDESKWALLPAPER = 20;
private static UInt32 SPIF_UPDATEINIFILE = 0x1;

static void Main(string[] args){
    string imageFileName = "C:\\file.jpg";
    SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, imageFileName, SPIF_UPDATEINIFILE);
}