In order to install the .NET Framework on your machine, Microsoft recommends the following system configuration:

• Processor: Minimum Pentium II-450Mhz (Pentium III-650Mhz recommended).
• Operating System: Windows 2000 (Server or Professional), Windows XP, or Windows NT 4.0 Server.
• Memory: 96 MB (128 MB recommended) for Windows 2000 Professional, 192MB (256 MB recommended) for Windows 2000 server.
• Hard drive: 500MB free on the drive where the OS is installed (usually C:\) and 2.5 Gigs free on the installation drive (where VS.NET will be installed)..

C# (pronounced "C sharp") is a simple, modern, object-oriented, and type-safe programming language. It will immediately be familiar to C and C++ programmers. C# combines the high productivity of Rapid Application Development (RAD) languages.

Visual C# .NET is Microsoft's C# development tool. It includes an interactive development environment, visual designers for building Windows and Web applications, a compiler, and a debugger. Visual C# .NET is part of a suite of products, called Visual Studio .NET, that also includes Visual Basic .NET, Visual C++ .NET, and the JScript scripting language. All of these languages provide access to the Microsoft .NET Framework, which includes a common execution engine and a rich class library. The .NET Framework defines a "Common Language Specification" (CLS), a sort of lingua franca that ensures seamless interoperability between CLS-compliant languages and class libraries. For C# developers, this means that even though C# is a new language, it has complete access to the same rich class libraries that are used by seasoned tools such as Visual Basic .NET and Visual C++ .NET. C# itself does not include a class library

As a new programming language following features made this different from other languages: -

• Simple
• Type safe
• Versioning: making new version of an application from existing one to work.
• Follows all OOPs paradigm
• Automatic garbage collection
• Flexible

As compared to c++, following concepts are added into c: -

• Assemblies
• Versioning
• Indexers
• Boxing
• Delegates