Can I initialize a C# attribute with an array or other variable number of arguments?

Question

Is it possible to create an attribute that can be initialized with a variable number of arguments?

For example:

[MyCustomAttribute(new int[3,4,5])]           


        

Answer 1

To piggy back on Marc Gravell's answer, yes you can define an attribute with array parameters but applying an attribute with an array parameter is not CLS-compliant. However just defining an attribute with an array property is perfectly CLS-compliant.

What made me realize this was that Json.NET, a CLS-compliant library, has an attribute class JsonPropertyAttribute with a property named ItemConverterParameters that's an array of objects.