What is ASP.NET ?

ASP.NET is a web development model which is used to deliver interactive , data driven web applications over the internet . It also consists of a large number of controls , such as textboxes , buttons ,labels and navigation controls etc. for assembling , configuring and manipulating code to create HTML pages. You can create ASP.Net application using any CLR Compliant language such as C# ,VB etc . The main features of ASP.NET are follows
Better Performance
Improved Security(Forms Authentication,windows authentication,passport authentication)
Greater Scalability
Cookie less sessions

What is C# ?

C# (C Sharp) is an object oriented programming language that enables you to develop secure ,reliable and robust applications on the Microsoft .Net Platform.
C# is simple type safe and object oriented programming language that invokes less coding and has a rich graphical user Interface.
We can build windows client applications , Distributed components , Client server web applications , Database web applications with the help of C#.
C# support Garbage collection at runtime and it supports the concept of properties , enumeration, and pre processor directives.
C# combines the power and efficiency of c++ and Simplicity and object oriented approaches of Java and creativeness of Visual Basic.

What is .Net Framework ?

.NET framework is windows internal component that consists of a virtual execution engine system called common language runtime and a set of class libraries that support the execution of applications created by various programming languages.
.Net framework is used to bridge the gap between applications created in different programming languages and provide interoperability between them.
.NET framework consists of classes , Interfaces , and value types that help in speeding up the development process and provide access to system functionality.