Is it possible to have a delegate as attribute parameter?

Question

Is it possible to have a delegate as the parameter of an attribute?

Like this:

public delegate IPropertySet ConnectionPropertiesDelegate();

public s         


        

Answer 1

Other possible workaround is creating abstract base Attribute type with abstract method matching your delegate definition, and then implementing the method in concrete Attribute class.

It has following benefits:

• Annotation is more concise and clean (DSL like)
• No reflection
• Easy to reuse

Example:

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Interface, AllowMultiple=false, Inherited=true)]
public abstract class GetConnectionAttribute : Attribute
{
    public abstract IPropertySet GetConnection();
}

public class GetConnectionFromPropertySetAttribute : GetConnectionAttribute
{
    public override IPropertySet GetConnection()
    {
        return new PropertySetClass();
    }
}

[GetConnectionFromPropertySet]
public class Test
{
}