Step 1: Open Visual Studio 2012

After clicking on "New Project" you will get screen like given below:-

Step 3: Select "Visual C#" from Project Type & "Windows Form Application" from Project Templates. 

Step 4: Drag and drop the ContextStripMenu from toolbox.

Step 5: Then Right click on Form1 and select the ContextStripMenu property and select your ContextStripMenu which drag and drop on editor.

Step 7: Double click on the refresh and exit to get it events.

Step 8: Write the this.Refresh() in refresh sub menu event below is example:
private void showToolStripMenuItem_Click(object sender, EventArgs e){      this.Refresh();}

Step 9: Write the this.Close() in Exit sub menu event below is example:
private void exitToolStripMenuItem_Click(object sender, EventArgs e){      this.Close();}       

Your coding has been done now, Just press F5 to run your code or Go to Menu Bar > Debug > Start Debugging. You will get current time. THANK YOU.