System.Diagnostics.CodeAnalysis.MemberNotNullAttribute
Specifies that the method or property will ensure that the listed field and property members have not-null values.
namespace System.Diagnostics.CodeAnalysis
{
internal sealed class MemberNotNullAttribute : Attribute
{
public string[] Members { get; }
public MemberNotNullAttribute(string member);
public MemberNotNullAttribute(params string[] members);
}
}