System.Diagnostics.CodeAnalysis.NotNullWhenAttribute

NotNullWhenAttribute

sealed class NotNullWhenAttribute : Attribute

Specifies that when a method returns ReturnValue, the parameter will not be null even if the corresponding type allows it.

public bool ReturnValue { get; }

Gets the return value condition.

public NotNullWhenAttribute(bool returnValue)

Initializes the attribute with the specified return value condition.