This is really a great addition in Visual Studio 2011 Developer Preview for ASP.NET developers. If you are familiar with WPF and XMAL development in Visual Studio, it should be well known for you, because preview version of Visual Studio supports generation of event handler code from XMAL markup itself. With Visual Studio 2011 developer preview, creating event handlers for ASP.NET controls have become significantly easy. You really don’t not need to write the event handler manually or generating the even handler from design view.
In VS 2011 Developer preview, markup intellisense for all ASP.NET server-side events will show you list of exiting handlers and a value called “<Create New Event>” . Which means you can attach the event with some exiting event handler or select “create New event” to generate an new handler with the right signature in the code-behind file.
If there is no control Id provided, Visual Studio will consider the control id as “Unnamed” and will generate the event handler as shown in below.
If you are wondering about what will happen if there are multiple controls without ids, does Visual studio going to attach with same event handler? No, It will append an incremental number with event handler name.
Visual Studio will generate Event handler name as <ControlName>_Click if control id is provided.
Interesting ? Well, you can check out few more interesting addition over here Few Nice features in Visual Studio 11 Developer Preview for ASP.NET Developers