Using return values, ref, and out parameters, Kyiv 2010

using_out_parameter.cs

// When a method outputs two or more values, use output parameters and return void
public void GetUserInfo(out string userName, out string password) {
  ...
}

using_ref_parameter.cs

// When a method takes an argument for input, also changes the argument for output, use a ref parameter
//
// That said, a method that changes its input arguments like this is a very bad idea, so don't do it!
public void DontDoThis(ref User user) {
  ...
}

using_return_value.cs

// A return value is useful when a method outputs a single value
public User CreateUserObject(string userName, string password) {
  ...
}