Implicit version of IsAssignableFrom?

In my code using reflections i wrote

if (f.FieldType.IsAssignableFrom("".GetType()))

I have a class that has an implicit conversion to strings. However the if statement above doesnt catch it. How can i make reflection/the above if statemen开发者_StackOverflowt catch strings and classes with implicit string conversion? instead of specifically strings and each class i know about?

I would use an extension method which gets all public static methods and checks for a method with the correct name and return type.

public static class TypeExtentions
{
    public static bool ImplicitlyConvertsTo(this Type type, Type destinationType)
    {

        if (type == destinationType)
            return true;


        return (from method in type.GetMethods(BindingFlags.Static |
                                               BindingFlags.Public)
                where method.Name == "op_Implicit" &&
                      method.ReturnType == destinationType
                select method
                ).Count() > 0;
    }
}

if(... || TypeDescriptor.GetConverter(f).CanConvertTo("".GetType()))