[DotNetDevelopment] Using both C# and Java

[swetha]

Hi Guys....Can any1 tell me how we can use both C# and Java in a
single application....for example i want to add two numbers ...is it
possible to do like.....create front end(GUI) using C# and then do
back end in Java (adding both the numbers) .....and then displaying it
back on the screen...can any1 please help me on this.....