Assign a value from App.Config to a Attribute of a Property

Question

We want to set a attribute value from app.config and using following code, it gives error

"An attribute argument must be a constant expression, typeof expression or array creation expression of an attribute parameter type"

public class A
{
        [JsonProperty(ConfigurationManager.AppSettings["Application:ExplicitUserTypeAttribute"]]
        public string ExplicitUserTypeAttribute { get; set; }
}

 

I understand this has to be a constant that can be computed at compile time but this is our requirement and I'm wondering if there is any work around to get it working.

Thanks!