If all of your server-side code is located within <script runat=server> tags in your .aspx files, all you need to do is upload the files to the server and they will be compiled automatically the first time they are executed."If you are using CodeBehind pages, you will have to compile your source code files into a .NET assembly and upload it to the appropriate \bin directory on the server. Using Visual Studio .NET is the simplest way to accomplish this.
With Visual Studio .NET you can develop your Web application on your local machine and then use the Copy Project feature (accessible from the VS.NET Project menu or from the Solution Explorer) to deploy your application to your Web site over the FrontPage Server extensions. Please see your Visual Studio documentation for more information on how to use this feature. Another option is to create a VS.NET Web project directly on the server and compile it. VS.NET will compile your project locally and upload it to the server all in one step. Again, see your Visual Studio documentation for more information.
If you do not have Visual Studio .NET, you can use the command-line compilers included with the .NET Framework SDK (download from http://www.microsoft.com/net) to compile your assemblies. You would compile them locally and then upload them to the appropriate \bin directory on the server.
There are also other tools available that can help you compile your .NET assemblies or with your .NET development.