private string getGroupJSON(Operation operation)
    {
        var group = new GroupJSON.Group();

        if (operation == Operation.CreateGroupOperation)
        {
            group.groupName = groupName.Text;
            group.groupType = "USER";
        }
        else if (operation == Operation.UpdateGroupOperation)
        {
            group.groupName = groupNameUpd.Text;
            group.groupType = "USER";
        }

        var serializer = new JavaScriptSerializer();
        var groupRoot  = new GroupJSON.RootObject();

        groupRoot.group = group;
        return(JsonConvert.SerializeObject(groupRoot, Formatting.Indented,
                                           new JsonSerializerSettings {
            NullValueHandling = NullValueHandling.Ignore
        }));
    }
    private string getGroupJSON(Operation operation)
    {
        var group = new GroupJSON.Group();
        if (operation == Operation.CreateGroupOperation)
        {
            group.groupName = groupName.Text;
            group.groupType = "USER";
        }
        else if (operation == Operation.UpdateGroupOperation)
        {
            group.groupName = groupNameUpd.Text;
            group.groupType = "USER";
        }

        var serializer = new JavaScriptSerializer();
        var groupRoot = new GroupJSON.RootObject();
        groupRoot.group = group;
        return JsonConvert.SerializeObject(groupRoot, Formatting.Indented,
                new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore });
    }