Struct Option.NoneType Helper class to represent "any absent value" which can be converted into any Option<T>. Inherited Members ValueType.Equals(Object) ValueType.GetHashCode() ValueType.ToString() Object.Equals(Object, Object) Object.GetType() Object.ReferenceEquals(Object, Object) Namespace: Microsoft.ML.Probabilistic.Collections Assembly: Microsoft.ML.Probabilistic.dll Syntax public struct NoneType