How Can I Kill A Running Thread?

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C#

Splash

Hello,

I created a SplasScreen class to show "processing..."(or any other) gif on a little form. (In this site, I read an article about this but i can't remember who wrote it) When i call the ShowSplash method, it shows a splash on the screen. And i use the CloseSplash method to close it. Usually, the CloseSplash method works, but sometimes it doesn't. I don't understand what can be the reason of this. And those are the codes:

public class SplashScreen : Form
   {
       public Bitmap SImage {get; set;}
       Thread t;

       public void Flash()
       {
           PictureBox pb = new PictureBox();
           pb.SizeMode = PictureBoxSizeMode.AutoSize;
           pb.Image = SImage;
           this.Width = pb.Width;
           this.Height = pb.Height;

           this.Controls.Add(pb);
           this.TopMost = true;
           this.StartPosition = FormStartPosition.CenterScreen;
           this.FormBorderStyle = FormBorderStyle.None;
           Application.Run(this);
       }


       public void sClose()
       {
           this.Close();
       }
       public void ShowSplash()
       {
           t = new Thread(new ThreadStart(Flash));
           t.IsBackground = true;
           t.SetApartmentState(ApartmentState.STA);
           t.Start();
       }
       public void CloseSplash()
       {
           if (this.InvokeRequired)
           {
               this.Invoke(new MethodInvoker(sClose));
           }

       }

   }

And an example for using it:

SplashScreen sc = new SplashScreen();
           sc.SImage = (Bitmap)Image.FromFile("processing.gif");
           sc.ShowSplash();

           //... codes codes codes...

           sc.CloseSplash();

Regards