name 'X509Certificate2UI' does not exist in the current context
asp.net-mvc, asp.net-mvc-4, c#
Solution
You need to include reference for `System.Security.dll` into your project, since it is not included in the `mscorlib` assembly, but in the `System.Security` assembly.
Problem
Does anyone had problem using X509Certificate2UI class in an Asp Net MVC4 application ``` using System.Security.Cryptography.X509Certificates; private static X509Certificate2 PickCertificate(StoreLocation location, StoreName name) { try { store.Open(OpenFlags.ReadOnly); //PROBLEM IS HERE X509Certificate2 cert = X509Certificate2UI.SelectFromCollection(store.Certificates, "Caption", "Message", X509SelectionFlag.SingleSelection)[0]; } catch (Exception) { throw; } } ``` It complains that there is no 'X509Certificate2UI' name in the current context No idea since the class is in System.Security.Cryptography.X509Certificates;