C# .NET TcpListener to Android Java Tcpclient?

Do you think it's possible to have a TCP Server running in C# using the TcpListener class from the .NET Framework that accepts connections from a TCP Client program being run under Java in Android?

I know TCP has a lot of standards and protocols or whatever, but I just figured Microsoft does like to monopolize things and maybe there's some sort of protocol being sent that makes it only acceptable to other .NET framework-written programs.

Idk, it sounds like a pretty stupid question now that I am actually writing it out but who knows.

Anwyay, Cross-platform TCP Server/Client connections? Possible?