What's new in C# 6.0: Null-conditional operators
One of the many new and nice C# 6.0 features is the Null-conditional operators. The example given in the linked presentation is the following: You want to do something as simple as raise an event, e.g. OnChanged(this, args); To be on the null pointer-safe side, you will have to make this an ugly abomination like: { var onChanged = OnChanged; if (onChanged != null) { onChanged(this, args); } } With C# 6.0 you can perform those checks easily with the so called "Elvis"-operator "?.": OnChanged?.Invoke(this, args); Sources: What's new in C# 6.0