ProxyAttribute.cs

using System.Runtime.InteropServices;
using System.Runtime.Remoting.Activation;
using System.Runtime.Remoting.Contexts;
using System.Security;
using System.Security.Permissions;

namespace System.Runtime.Remoting.Proxies
{
    [SecurityCritical]
    [AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = true)]
    [ComVisible(true)]
    [SecurityPermission(SecurityAction.InheritanceDemand, Flags = SecurityPermissionFlag.Infrastructure)]
    public class ProxyAttribute : Attribute, IContextAttribute
    {
        [SecurityCritical]
        public virtual MarshalByRefObject CreateInstance(Type serverType)
        {
            if (serverType == null)
            {
                throw new ArgumentNullException("serverType");
            }
            RuntimeType runtimeType = serverType as RuntimeType;
            if (runtimeType == null)
            {
                throw new ArgumentException(Environment.GetResourceString("Argument_MustBeRuntimeType"));
            }
            if (!serverType.IsContextful)
            {
                throw new RemotingException(Environment.GetResourceString("Remoting_Activation_MBR_ProxyAttribute"));
            }
            if (serverType.IsAbstract)
            {
                throw new RemotingException(Environment.GetResourceString("Acc_CreateAbst"));
            }
            return CreateInstanceInternal(runtimeType);
        }

        internal MarshalByRefObject CreateInstanceInternal(RuntimeType serverType)
        {
            return ActivationServices.CreateInstance(serverType);
        }

        [SecurityCritical]
        public virtual RealProxy CreateProxy(ObjRef objRef, Type serverType, object serverObject, Context serverContext)
        {
            RemotingProxy remotingProxy = new RemotingProxy(serverType);
            if (serverContext != null)
            {
                RealProxy.SetStubData(remotingProxy, serverContext.InternalContextID);
            }
            if (objRef != null && objRef.GetServerIdentity().IsAllocated)
            {
                remotingProxy.SetSrvInfo(objRef.GetServerIdentity(), objRef.GetDomainID());
            }
            remotingProxy.Initialized = true;
            if (!serverType.IsContextful && !serverType.IsMarshalByRef && serverContext != null)
            {
                throw new RemotingException(Environment.GetResourceString("Remoting_Activation_MBR_ProxyAttribute"));
            }
            return remotingProxy;
        }

        [SecurityCritical]
        [ComVisible(true)]
        public bool IsContextOK(Context ctx, IConstructionCallMessage msg)
        {
            return true;
        }

        [SecurityCritical]
        [ComVisible(true)]
        public void GetPropertiesForNewContext(IConstructionCallMessage msg)
        {
        }
    }
}