Silverlight 4, subclassing WebClient
Following an advice, I saw at several web pages (for example Using CookieContainer with WebClient class ), I subclassed WebClient class to use a cookie with it: public class MyWebClient : System.Net.WebClient { } Now, when I initialize MyWebClient: MyWebClient wc = new MyWebClient(); it throws TypeLoadException. My OS is Windows 7 (japanese), so error message is not in english; I see it is related to security rules. What might be the problem? Stephen McDaniel WebClient's constructor is marked with the SecuritySafeCritical attribute. And it looks like that is what is causing the security