When people are first using Nullable types you'll often see code like the following:

int? myInt;
int result;
if (myInt.HasValue)
result = myInt.Value;
result = 0;
While this code is perfectly workable, it's a bit on the verbose side of things.

You can easily refactor this code using the GetValueOrDefault() method as shown here:

int? myInt;
int result = myInt.GetValueOrDefault();
You can also specify a value in the parameters to return something other than 0 (or whatever the default value for the type normally is).

For example

int result = myInt.GetValueOrDefault(123);