You can always use the form T?, rather than Nullable<T>, to declare a variable whose type is a nullable value type. The type T can be any built-in or custom value type.
This means that you can use this syntax for your own custom enum or struct types.
For example, if you have the following custom types:
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| public enum Mood{ Crabby, Happy, Petulant, Elated}public struct Point3D{ public float X, Y, Z; public string Name; public Point3D(float x, float y, float z, string name) { X = x; Y = y; Z = z; Name = name; }} |
You can use the T? format as follows:
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| Mood? myMood = null;Mood mood2 = myMood ?? Mood.Elated;Point3D? somePoint = null;Point3D defaultPoint = new Point3D(0.0f, 0.0f, 0.0f, "Origin");Point3D aPoint = somePoint ?? defaultPoint; |