How can I assign a property to an attribute

Question

I would like to assign a property string to below attribute. ``` [ExtractKeyAttribute(**"Extraction"**)] public class Extract { .... } ``` so extraction is my string but I don't want hard code into there. Any suggestions on better way to assign

Accepted Answer

You can't do this.

Attribute values must be constant expressions. The values are baked into the compiled code. If you don't want to use a constant expression, you can't use an attribute... and you possibly shouldn't. It may mean you're using attributes when you should be using a different approach.

You might want to read Eric Lippert's blog post on properties vs attributes.

Of course, you don't have to use a string literal there. You could have:

```
[ExtractKey(ExtractionKeys.Extraction)]
...

public static class ExtractionKeys
{
    public const string Extraction = "Extraction";
}
```

... but it's still a compile-time constant.

How can I assign a property to an attribute

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