public CreateRolePreCommand(IRoleManagementRoleValidatorResolver validatorResolver, IProvideUserConfiguration userConfiguration)
        {
            if (validatorResolver == null)
                throw new ArgumentNullException("validatorResolver");

            if (userConfiguration == null)
                throw new ArgumentNullException("userConfiguration");

            this.validatorResolver = validatorResolver;
            this.userConfiguration = userConfiguration;
        }
        public RenameRolePreCommand(IRoleManagementRoleService service, IRoleManagementRoleValidatorResolver validatorResolver)
        {
            if (service == null)
                throw new ArgumentNullException("service");

            if (validatorResolver == null)
                throw new ArgumentNullException("validatorResolver");

            this.service = service;
            this.validatorResolver = validatorResolver;
        }