Checking if Type instance is a nullable enum in C#

Question

How do i check if a Type is a nullable enum in C# something like

Type t = GetMyType(); bool isEnum = t.IsEnum; //Type member bool isNullableEnum = t.IsNullableEnum(); How to implement this extension method? 

Answer 1

public static bool IsNullableEnum(this Type t) {     Type u = Nullable.GetUnderlyingType(t);     return (u != null) && u.IsEnum; } 

Answer 2

EDIT: I'm going to leave this answer up as it will work, and it demonstrates a few calls that readers may not otherwise know about. However, Luke's answer is definitely nicer - go upvote it :)

You can do:

public static bool IsNullableEnum(this Type t) {     return t.IsGenericType &&            t.GetGenericTypeDefinition() == typeof(Nullable<>) &&            t.GetGenericArguments()[0].IsEnum; }