By default, parameters are passed to a method by value, which means that a copy of each parameter is made and passed to the method.
Because the method works with a copy of the data, changes made to a parameter are not visible outside the method. Parameters passed by value can be thought of as input parameters.
For example, assume that we have the following Bark method, which takes a parameter named barkPhrase. Notice that we attempt to change the value of barkPhrase before returning to the caller.
1 2 3 4 5 6 | public void Bark(string barkPhrase){ Console.WriteLine("{0} says: {1}", Name, barkPhrase); barkPhrase = "Yowza!"; // Just changing our copy} |
Assume that we called the Bark method as follows:
1 2 | string myBark = "Wooferooni";kirby.Bark(myBark); |
We can verify in the debugger that the myBark variable does not change when we call the Bark method.
