I have any simple question about k2.

Good, day

There are a number of factors which will influence the decision on which language to choose. They range from the organizations programming skill base, comfort & confidence levels surrounding development in a specific language and broader requirements from the solutions you are about going to develop.

The MSDN web site has some excellent information discussing the subject. This includes a number of 'Walkthroughs' which will assist you to make your final decision. Please follow the links below:

Programming Languages:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vsent7/html/vxconProgrammingLanguages.asp

Walkthroughs:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vbcon/html/vbconprojectpropertychangesinvisualbasic70.asp

Kind regards