RadDock Command is a button which appears in the top right corner of the RadDock 	titlebar. Each command can optionally perform postback. RadDock provides the Command 	event, which is fired when a command was clicked on the client. 
	 	RadDock comes with three integrated commands: ExpandCollapse, Close and PinUnpin. 	By default they will be displayed in the titlebar, unless you modify the DefaultCommands 	property, or the Commands collection. 
	 	You can easily create custom commands by adding DockCommand objects to the Commands 	collection. If you want to encapsulate functionality, you may inherit from DockCommand 	and provide new default values for the existing properties, or add new properties, 	which will be sent to the client-side object.