Is there a way to add an Attribute to an existing type? Like say I
wanted to add a [MyCustomAttribute] to the List<int> type, how would I
go about doing that?

Also is there any way to attach Attributes to types at runtime?

You can add attributes to type at runtime but only in a very special
circumstance.

Any object subject to reflection can be given a TypeDescriptionProvider.
This enables the TypeDescriptor to return any custom information yo may
desire, including dynamically created attributes, extra properties and
so-on.

Normally attributes are compiler generated, fixed and only instantiated when
reflection is used.

--
Bob Powell [MVP]
Visual C#, System.Drawing

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<(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Is there a way to add an Attribute to an existing type? Like say I
> wanted to add a [MyCustomAttribute] to the List<int> type, how would I
> go about doing that?
>
> Also is there any way to attach Attributes to types at runtime?
>

Hi,

Why do you need to add an attribute to an FCL type?

(BTW, you couldn't add an attribute to List<int> anyway since it doesn't
exist. List<T> is the class).

You could derive a class from List<int> and add a custom attribute to that
if you want.

--
Dave Sexton

<(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Is there a way to add an Attribute to an existing type? Like say I
> wanted to add a [MyCustomAttribute] to the List<int> type, how would I
> go about doing that?
>
> Also is there any way to attach Attributes to types at runtime?
>

I'm using Attributes to indicate to a class what types should be
ignored while processing data using reflection. Using the
TypeDescriptor seems to be working, as long as you check for the
Attribute using the TypeDescriptor and not just the
Type.GetCustomAttributes()...

Dave Sexton wrote:
> Hi,
>
> Why do you need to add an attribute to an FCL type?
>
> (BTW, you couldn't add an attribute to List<int> anyway since it doesn't
> exist. List<T> is the class).
>
> You could derive a class from List<int> and add a custom attribute to that
> if you want.