Alongside nullable value types ^{C# 2.0} a new ?? operator was added to make working with nulls easier.

Code

Now

intro = post.Intro ?? MakeIntro(post);

Before

intro = post.Intro != null ? post.Intro : MakeIntro(post);

Notes

• The null-conditional operators ^{C# 6.0} can also help with similar scenarios
• Null coalescing assignment ^{C# 8.0} adds ??= to assign only when the target is null

More information

• C# Language Reference
• Null Coalescing (??) Operator in C# @C# Corner