communication between vb and c#

hai i am suchi,

i am new to c#
i developed my userinterface in vb,my vb application sends userid and password,in xml format over soap, that data is fetched by asp page and it returns the response in xml format, now i want my vb application to post the  xml data to c# application and that c# application should call the asp file and display  the result at vb  side.

  please help me ,it is very essential