C# Language Null-conditional Operators

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  • X?.Y; //null if X is null else X.Y
  • X?.Y?.Z; //null if X is null or Y is null else X.Y.Z
  • X?[index]; //null if X is null else X[index]
  • X?.ValueMethod(); //null if X is null else the result of X.ValueMethod();
  • X?.VoidMethod(); //do nothing if X is null else call X.VoidMethod();


Note that when using the null coalescing operator on a value type T you will get a Nullable<T> back.

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