Error de proceso de negocio System.Security.SecurityException: Solicitud de permiso de tipo 'System.Security.Permissions.FileIOPermission, mscorlib, Version = 4.0.0.0, Culture = neutral, PublicKeyToken = b77a5c561934e089 'falló. en System.Security.CodeAccessSecurityEngine.Check (demanda de objetos, StackCrawlMark & stackMark, Boolean isPermSet) en System.Security.CodeAccessPermission.Demand () en System.IO.FileStream.Init (ruta de cadena, modo FileMode, acceso FileAccess, derechos Int32, Boolean derechos useRights, FileShare share, Int32 bufferSize, opciones de FileOptions, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost) en System.IO.FileStream..ctor (ruta de cadena, modo FileMode, FileAccess access, FileShare Access32, FileShare Access32, FileShare Access32, acceso FileShare , Opciones de FileOptions, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost) en System.IO.File.InternalWriteAllBytes (ruta de cadena, Byte [] bytes, Boolean checkHost) en RetrieveAttachments.RetrieveClass.Execute (IServiceProvider) era: Demanda El tipo de primer permiso que falló fue: System.Security.Permissions.FileIOPermission La zona del ensamblado que falló fue: MyComputer

También agregué el siguiente método en el archivo plugin AssemblyInfo.cs[ensamblaje: System.Security.AllowPartiallyTrustedCallers] pero plantea el mismo error.

QueryExpression notes = new QueryExpression { EntityName = "annotation", ColumnSet = new ColumnSet("filename", "subject", "annotationid", "documentbody","mimetype") };
notes.Criteria.AddCondition("annotationid", ConditionOperator.Equal, annotationid);
     EntityCollection NotesRetrieve = service.RetrieveMultiple(notes);
     if (NotesRetrieve != null && NotesRetrieve.Entities.Count > 0)
     {
      foreach (var note in NotesRetrieve.Entities)
      {
       string fileName = note.GetAttributeValue<string>("filename");
       string cleanFileName = string.Empty;
       foreach (var chr in fileName.ToCharArray().ToList())
       {
        if(!Path.GetInvalidFileNameChars().Contains(chr)) cleanFileName = cleanFileName + chr; 
       }
     FileIOPermission f = new FileIOPermission(FileIOPermissionAccess.Write, @"D:\note");
     string fileLocation = Path.Combine(@"D:\note", cleanFileName);
     byte[] fileContent = Convert.FromBase64String(NotesRetrieve.Entities[0].Attributes["documentbody"].ToString());
     System.IO.File.WriteAllBytes(fileLocation, fileContent);
    }
   }