Is it possible to use operator ?? and throw new Exception()?

I have a number of methods doing next:

var result = command.ExecuteScalar() as Int32?;
if(result.HasValue)
{
   return result.Value;
}
else
{
   throw new Exception(); // just an example, in my code I throw my own exception
}

I wish I could use operator ?? like this:

return command.ExecuteScalar() as Int32? ?? throw new Exception();

but it generates a compilation error.

Is it possible to rewrite my code or there is only one way to do that?