.NET Demon is a Visual Studio extension that continuously compiles your code. It can:

• continuously save your code as you type, with a configurable waiting period after typing
• build your project every time you save 
• compile your code as you type (using the two options above
• replace the Visual Studio build system with the optimized .NET Demon build system, which only re-compiles changed code
• continuously update the list of errors in Visual Studio
• integrate with LiveReload for Chrome to reload the browser tab every time it rebuilds a web application