how to install ide and from which website do we get this is ide

Answer 1

If you are working in Netbeans then here: https://netbeans.org/downloads/
If you are working in Eclipse then here: https://eclipse.org/downloads/

Answer 2

For C# Development, dont use anything else than Microsoft's Visual Studio

Answer 3

Official site of Microsoft

Answer 4

Open up your browser -> google.com -> search for "Microsoft visual studio"