What is the difference between Nullable.GetValueOrDefault() and Nullable.Value?

Question

Are there other scenarios where I need to use one of the following other than what is mentioned?

• Nullable.GetValueOrDefault(): If the value is null, you will get null, otherwise the value.
• Nullable.Value: If the value is null, an exception will be thrown.
• Nullable<>.HasValue: Returns true or false.
• Nullable<> != null Same as above.

I was a bit confused because I have seen codes on GitHub check the HasValue or != null then return the value if true, otherwise return null. I would rather just use the first. Is there any side-effect or something that I am missing?

Answer 1

Nullable.Value throws an exception if Nullable.HasValue is false. Nullable.GetValueOrDefault() returns the type's default value if Nullable.HasValue is false.