Security accessibility of the overriding method must match the security accessibility of the method

Security accessibility of the overriding method must match the security accessibility of the method being overridden

Problem

You get this error when running your application.

Inheritance security rules violated while overriding member: MyApp4.Business.OrdersTable.GetObjectData. Security accessibility of the overriding method must match the security accessibility of the method being overridden

Your application is a Website using the .net framework 4.0 or 4.5 and you are running in medium trust.

Solution

Use the application wizard to change to a Web Applilcation. Using medium trust requires a web application, which will add the following code to all AssemblyInfo.cs (.vb) files in your application.

Visual Basic .NET:

Imports System.Security

<Assembly: SecurityRules(SecurityRuleSet.Level1)>

C#:

using System.Security;

[assembly: SecurityRules(SecurityRuleSet.Level1)]