System.Drawing.Region.Dispose C# (CSharp) Method

        public void Dispose()
        {
            Dispose (true);
            System.GC.SuppressFinalize (this);
        }

 /// <summary>
 /// Invalidates <em>this</em> layer over the given Region. (In 1x1 space.)
 /// </summary>
 public void Invalidate(Region region)
 {
     if (this.Substrate != null)
     {
         System.Drawing.Region r = null;
         try {
             r = new System.Drawing.Region(region.GetRegionData());
             r.Transform(InvertMatrix(this.To1x1Transform));
             if (this.Substrate.InvokeRequired)
             {
                 this.Substrate.Invoke(new SubstrateInvalidateDelegate(SubstrateInvalidate), new object[] { r });
             }
             else
             {
                 this.Substrate.Invalidate(r);
             }
         }
         catch (System.ArgumentException ex) {
             // This happened once during live stream playback
             // apparently inside the Invert operation above.
             Debug.WriteLine(ex.ToString());
         }
         catch (InvalidOperationException ex) {
             // This can happen due to a GDI+ threading issue when trying to clone a Transform. "Object is in use elsewhere."
             Debug.WriteLine(ex.ToString());
         }
         finally {
             if (r != null)
             {
                 r.Dispose();
             }
         }
     }
     this.OnInvalidated(new RegionEventArgs(region));
 }