Property IsRequired

Gets or sets a value indicating whether the parameter must never be null. When this property is true, the compiler reports an error when the advice can run before the method yields, which is the case of every advice except the resume advice, and when the target method cannot provide its task. The resume advice can also run before the method yields when the entry advice of its group yields on an awaiter that is already completed, so the compiler also reports an error when that entry advice has an AwaiterAttribute parameter. The default value is false.