.Net Framework is an environment which is used for 
developing various applications ranging from windows 
applications, web applications and webservices.

.Net Framework is an environment which is used for
developing various application ranging from windows
application, web application & webservices

.net framework is a combination of CLR(common language 
runtime),FCL(framework class library),Data and XML classes 
and windows,web services,web applications.

The .NET Framework has two main components: the common
language runtime and the .NET Framework class library.
You can think of the runtime as an agent that manages code
at execution time, providing core services such as memory
management, thread management, and remoting, while also
enforcing strict type safety and other forms of code
accuracy that ensure security and robustness.
The class library is a comprehensive, object-oriented
collection of reusable types that you can use to develop
applications ranging from traditional command-line or
graphical user interface (GUI) applications to applications
based on the latest innovations provided by ASP.NET, such as
Web Forms and XML Web services.