c# Memory Clean of Objects

finally statement is to ensure that the necessary cleanup of objects, usually objects that are holding external resources, occurs immediately, even if an exception is thrown. One example of such cleanup is calling Close on a FileStream immediately after use instead of waiting for the object to be garbage collected by the common language runtime, as follows

static void CodeobjectCleanup()

{

    System.IO.FileStream file = null;

    System.IO.FileInfo fileInfo = new System.IO.FileInfo("C:\\file.txt");

    file = fileInfo.OpenWrite();

    file.WriteByte(0xF);

    file.Close();

}