ASP.NET Developers can start here 

Composite natively supports ASP.NET User Controls which enables developers to utilize Microsoft .NET and especially ASP.NET when building websites.

• Embed your existing ASP.NET User Controls into Composite templates and pages in a matter of minutes
• No Composite specific code required - just copy and deploy
• Full support for ASP.NET features like postbacks, forms authentication, debugging with Visual Studio etc.

With Composite the ASP.NET developer can focus on the compiler and functional requirements at hand and leave design, frontend development and content management to other team members.