C# Free Image file from use -

I have a temporary image file with which I

  bitmap-capped emg = (bitmap) ) Open Image.FromFile ("Item / Item.bmp");   
 And because it's temporary I want to replace it with another image for another use, but the program is still using that image and I can not do anything.  
 How to go let's go from image to replace?   
 
 
 I had a similar problem and could not use it because the file was overwritten by some asynchronous code it was done. I resolved this issue by copying the bitmap and filling the original one:  
  bitmap tmpBmp = new bitmap (full filename); Bitmap image = new bitmap (tmpbmp); TmpBmp.Dispose ();