TypeBuilder.AddDeclarativeSecurity(SecurityAction, PermissionSet) Method

Definition

Namespace:

System.Reflection.Emit

Assembly:

mscorlib.dll

Adds declarative security to this type.

C#

public void AddDeclarativeSecurity(System.Security.Permissions.SecurityAction action, System.Security.PermissionSet pset);

Parameters

action

SecurityAction

The security action to be taken such as Demand, Assert, and so on.

pset

PermissionSet

The set of permissions the action applies to.

Exceptions

ArgumentOutOfRangeException

The action is invalid (RequestMinimum, RequestOptional, and RequestRefuse are invalid).

InvalidOperationException

The containing type has been created using CreateType().

-or-

The permission set pset contains an action that was added earlier by AddDeclarativeSecurity.

ArgumentNullException

pset is null.

Examples

The following example demonstrates the use of the AddDeclarativeSecurity method to add a security demand for SecurityPermission with the SecurityPermissionFlag.ControlEvidence flag to a dynamic type named MyDynamicClass, in an assembly named EmittedExample.dll. The example produces no console output; after you run it, you can use Ildasm.exe (IL Disassembler) to examine EmittedExample.dll. In MyDynamicClass, open the .class public auto ansi statement to see the declarative permission.

C#

using System;
using System.Reflection;
using System.Reflection.Emit;
using System.Security;
using System.Security.Permissions;

namespace CustomAttribute_Sample
{
   public class MyApplication
   {
      static void Main()
      {
         // Create a simple name for the assembly, and create the assembly and module.
         AssemblyName myAssemblyName = new AssemblyName("EmittedAssembly");
         AssemblyBuilder myAssemblyBuilder =
            AppDomain.CurrentDomain.DefineDynamicAssembly(myAssemblyName, AssemblyBuilderAccess.RunAndSave);
         ModuleBuilder myModuleBuilder =
            myAssemblyBuilder.DefineDynamicModule("EmittedAssembly", "EmittedAssembly.dll");

         // Define a public class named "MyDynamicClass" in the assembly.
         TypeBuilder myTypeBuilder = myModuleBuilder.DefineType("MyDynamicClass",
            TypeAttributes.Public);

         // Create a permission set and add a security permission
         // with the ControlEvidence flag.
         //
         PermissionSet myPermissionSet = new PermissionSet(PermissionState.None);
         myPermissionSet.AddPermission(
             new SecurityPermission(SecurityPermissionFlag.ControlEvidence));

         // Add the permission set to the MyDynamicClass type,
         // as a declarative security demand.
         //
         myTypeBuilder.AddDeclarativeSecurity(SecurityAction.Demand, myPermissionSet);

         Type myType = myTypeBuilder.CreateType();
         myAssemblyBuilder.Save("EmittedAssembly.dll");
      }
   }
}

Remarks

AddDeclarativeSecurity may be called several times with each call specifying a security action (such as Demand, Assert, or Deny) and a set of permissions that apply to the action.

Note

In the .NET Framework versions 1.0, 1.1, and 2.0, the declarative security attributes applied to a type by using this method are stored in the old XML metadata format.

Applies to