c# - 检查 Type 实例是否为 C# 中的可空枚举

Question

我如何在 C# 中检查类型是否为可为 null 的枚举 像

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;
}