How to check if a type is marked with an attribute?

Does it needs re开发者_如何学Cflection?

Yes:

Attribute.IsDefined(yourType, attributeType);

Except for [Serializable], which might also be yourType.IsSerializable (if you check the IL, [Serializable] doesn't actually get written as an attribute - there is a special type modifier; either approach works fine, though).