42

.net 4.0 supports more then 96 languages

https://social.msdn.microsoft.com/Forums/vstudio/en-US/f0292393-4810-4621-b85d-bad931e8effe/net-supports-how-many-languages-?forum=netfxbcl

Aproximatly 23 language

.Net support 63 programming language.In which 11 language has developed by Microsoft and remaining 52 language has developed by other company or organization.