Why does this code lock my files?

Question

Ive narrowed down to this method, but I don't understand why the file blocks it. I suppose you could use something like

using( something)
{

//do stuff here
}

But I'm not sure that A) will solve the problem or B) would be the right way if this happened.

any ideas?

[DllImport("user32.dll", CharSet = CharSet.Auto)]private static extern Int32 SystemParametersInfo(UInt32 action, UInt32 uParam, String vParam, UInt32 winIni);  
    private static readonly UInt32 SPI_SETDESKWALLPAPER  = 0x14;  
    private static readonly UInt32 SPIF_UPDATEINIFILE    = 0x01;  
    private static readonly UInt32 SPIF_SENDWININICHANGE = 0x02;  

    private void SetWallpaper(string path)
    {
        try
        {
            Image imgInFile = Image.FromFile(path);
            imgInFile.Save(SaveFile, ImageFormat.Bmp);
            SystemParametersInfo(SPI_SETDESKWALLPAPER, 3, SaveFile, SPIF_UPDATEINIFILE | SPIF_SENDWININICHANGE);
        }
        catch
        {
            MessageBox.Show("error in setting the wallpaper");
        }
    }

#

Updated Code

 private void SetWallpaper(string path)
    {
        if (File.Exists(path))
        {
            Image imgInFile = Image.FromFile(path);
            try
            {
                imgInFile.Save(SaveFile, ImageFormat.Bmp);
                SystemParametersInfo(SPI_SETDESKWALLPAPER, 3, SaveFile, SPIF_UPDATEINIFILE | SPIF_SENDWININICHANGE);
            }
            catch
            {
                MessageBox.Show("error in setting the wallpaper");
            }
            finally
            {
                imgInFile.Dispose();
            }
        }
    }

Answer 1

From MSDN : "The file remains locked until the image is deleted." - so yes, this should be fixed:

using (Image imgInFile ...) { ... }

(As a remark, I would delay try catch only for calls to .Save () and / or SystemParametersInfo ())

Answer 2

, , , . , .

( , .Dispose() ) COM Windows API (.. ).

Answer 3

Here is what I want to let me know if you see anything that I can do. But he works like a champion, so I'm very happy.

                private void SetWallpaper(string path)
                {
                    if (File.Exists(path))
                    {
                        Image imgInFile = Image.FromFile(path);
                        try
                        {
                            imgInFile.Save(SaveFile, ImageFormat.Bmp);
                            SystemParametersInfo(SPI_SETDESKWALLPAPER, 3, SaveFile, SPIF_UPDATEINIFILE | SPIF_SENDWININICHANGE);
                        }
                        catch
                        {
                            MessageBox.Show("error in setting the wallpaper");
                        }
                        finally
                        {
                            imgInFile.Dispose();
                        }
                    }

                    Else
                    {
                          messagebox.show("Error with path: "+path+" Not found or in use");
                    }
                }