System.Diagnostics.CodeAnalysis.MaybeNullWhenAttribute
Specifies that when a method returns ReturnValue, the parameter may be null even if the corresponding type disallows it.
namespace System.Diagnostics.CodeAnalysis
{
internal sealed class MaybeNullWhenAttribute : Attribute
{
public bool ReturnValue { get; }
public MaybeNullWhenAttribute(bool returnValue);
}
}