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Add note about interactions in operators #18124

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Apr 29, 2020
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Add note about interactions in operators #18124

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Add note about interactions in operators
BillWagner Apr 28, 2020
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respond to feedback
BillWagner Apr 28, 2020
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typos
BillWagner Apr 28, 2020
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rework note based on feedback.
BillWagner Apr 28, 2020
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one final set of changes
BillWagner Apr 28, 2020
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2 changes: 1 addition & 1 deletion docs/csharp/language-reference/operators/member-access-operators.md
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Expand Up @@ -133,7 +133,7 @@ In the preceding example, if you don't use the `??` operator, `numbers?.Length <
The null-conditional member access operator `?.` is also known as the Elvis operator.

> [!NOTE]
> The null conditional operators can interact with the [null forgiving operator](null-forgiving.md) in unexpected ways. In C# 8 the expression `x?.y!.z` is parsed as `(x?.y)!.z`. Due to this interpretation `z` is evaluated even if `x` is null, which may result in a <xref:System.NullReferenceException>.
> The null-conditional operators can interact with the [null-forgiving-operator](null-forgiving.md) in unexpected ways. In C# 8 the expression `x?.y!.z` is parsed as `(x?.y)!.z`. Due to this interpretation `z` is evaluated even if `x` is null, which may result in a <xref:System.NullReferenceException>.
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### Thread-safe delegate invocation

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2 changes: 1 addition & 1 deletion docs/csharp/language-reference/operators/null-forgiving.md
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Expand Up @@ -14,7 +14,7 @@ Available in C# 8.0 and later, the unary postfix `!` operator is the null-forgiv
The null-forgiving operator has no effect at run time. It only affects the compiler's static flow analysis by changing the null state of the expression. At run time, expression `x!` evaluates to the result of the underlying expression `x`.

> [!NOTE]
> The null forgiving operator can interact with the [null conditional operators](member-access-operators.md#null-conditional-operators--and-) in unexpected ways. In C# 8 the expression `x?.y!.z` is parsed as `(x?.y)!.z`. Due to this interpretation `z` is evaluated even if `x` is null, which may result in a <xref:System.NullReferenceException>.
> The null-forgiving operator can interact with the [null-conditional-operators](member-access-operators.md#null-conditional-operators--and-) in unexpected ways. In C# 8 the expression `x?.y!.z` is parsed as `(x?.y)!.z`. Due to this interpretation `z` is evaluated even if `x` is null, which may result in a <xref:System.NullReferenceException>.

For more information about the nullable reference types feature, see [Nullable reference types](../builtin-types/nullable-reference-types.md).

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