public static extern void uv_pipe_connect(UvConnectRequest req,UvPipeHandle handle,string name,uv_connect_cb cb);
 public void pipe_connect(UvConnectRequest req, UvPipeHandle handle, string name, uv_connect_cb cb)
 {
     req.Validate();
     handle.Validate();
     _uv_pipe_connect(req, handle, name, cb);
 }