Visual Studio is the most powerful and comprehensive tool for developing applications for ASP.NET. Several versions have come along since the release of the .NET Framework, with 2002 and 2003 supporting versions 1.0 and 1.1, respectively, and 2005 supporting v2.0.
Developing with the earlier versions introduces some issues and "gotchas" when developing ASP.NET applications. Version 2005 has solved many of the problems for Web developers and has made great strides in making Web development more flexible.
Source control solutions such as Visual Source Safe enable developers to share and version code. A system of checkouts and code comparison keeps everyone up-to-date.
The debugger in Visual Studio can be the developer's best friend when trying to stomp out bugs. The debugger enables you to step through your code one line at a time and peek in to see what values objects contain.