PRB: Appdomains Security Permission Error Message When You Access the Strong-Named Assembly from the \Bin Directory

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Install a Strong-Named Assembly in the Global Assembly Cache

1. To create a strong-name assembly, follow the steps in the "More Information" section of this article.
2. Open Visual Studio .NET Command Prompt, and then type the following command: gacutil -I "C:\[PathToBinDirectoryInVSProject]\sampledll.dll
   
   Note: sampledll.dll is the name of the DLL that is signed with strong name.

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Add the APTCA

1. To create a strong-name assembly, follow the steps in the "More Information" section of this article.
2. Replace the code in Class1 with the following code:
   
   Visual C# .NET Code

   using System;
   using System.Reflection;
   using System.Runtime.InteropServices;
   using System.Security;
   
   [assembly: AssemblyKeyFile("..\\..\\key.snk")]
   [assembly:AllowPartiallyTrustedCallers] 
   
   namespace SNAssemblyTest
   {
   	public class Class1
   	{	// Test Class
   	}
   }
   

   Visual Basic .NET Code

   Imports System.Reflection
   Imports System.Runtime.InteropServices
   Imports System.Security
   
   <Assembly: AssemblyKeyFile("..\..\key.snk")> 
   <Assembly: AllowPartiallyTrustedCallers> 
   
   Public Class Class1
      ' Test Class
   End Class
   

1. The assemblies have been designed and been built with explicit attention to security considerations to help protect them against all callers, including potentially malicious callers.
2. Appropriate security testing with partially trusted code is completed before the code is released.

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Steps to Reproduce the Behavior

Create a StrongName Assembly

1. Start Microsoft Visual Studio .NET 2003.
2. On the File menu, point to New, and then click Project.
3. Select Visual C# project or Visual Basic Projects under Project Types.
4. Select Class Library under Templates.
5. Name the project as SNAssemblyTest.
6. Open the Visual Studio .NET Command Prompt, and then change the directory to the current project directory.
7. To create a strong-named key, type the following command: sn -k key.snk
8. Replace the code in Class1 with the following code:
   
   Visual C# .NET Code

   using System;
   using System.Reflection;
   using System.Runtime.InteropServices;
   
   [assembly: AssemblyKeyFile("..\\..\\key.snk")]
   
   namespace SNAssemblyTest
   {
   	public class Class1
   	{	// Test Class
   	}
   }
   

   Visual Basic .NET Code

   Imports System.Reflection
   Imports System.Runtime.InteropServices
   
   <Assembly: AssemblyKeyFile("..\..\key.snk")> 
   
   Public Class Class1
      ' Test Class
   End Class
   

9. On the Build menu, click Build Solution.

Refer to the Assembly in an ASP.NET Web Application

1. Start Visual Studio .NET, and then create a new ASP.NET Web Application project by using Visual C# .NET or Visual Basic .NET.
2. In Solution Explorer, right-click References, and then click Add Reference.
3. Click Browse, and then select the .dll file of the assembly that you created in the "Create a StrongName Assembly" section of this article (SNAssemblyTest.dll).
4. To open the Web.config file, double-click Web.config in the Solution Explorer.
5. Add the following code trust level code in the <system.web> element of the Web.config file:

   <trust level="High"  />

6. To run the project, click Start on the Debug menu. You may receive the error that is mentioned in the "Symptoms" section of this article.

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