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The C1TabControl control allows you to add a drop-down menu that allows users to select a tab and tab page from a menu. When enabled, this drop-down menu is accessible from the control's tabstrip. The drop-down menu appears as follows:

To activate the drop-down menu, simply set the C1TabControl.TabStripMenuVisibility property to Visible:
To add a menu to the tabstrip, add TabStripMenuVisibility="Visible" to the <c1:C1TabControl> tag so that the markup resembles the following:
<c1:C1TabControl TabStripMenuVisibility="Visible"></c1:C1TabControl>
Complete the following steps:
C1TabControl1.TabStripMenuVisibility = Visible
c1TabControl1.TabStripMenuVisibility = Visible;
Complete the following steps: