During the development of code that emits dynamic assemblies, it is recommended that you use an overload of the erload:System.AppDomain.DefineDynamicAssembly method that specifies evidence and permissions, supply the evidence you want the dynamic assembly to have, and include System.Security.Permissions.SecurityPermissionFlag.SkipVerification in refusedPermissions. Including System.Security.Permissions.SecurityPermissionFlag.SkipVerification in the refusedPermissions parameter ensures that the MSIL is verified. A limitation of this technique is that it also causes System.Security.SecurityException to be thrown when used with code that demands full trust.