nopCommerce 4.2 Validation is not working while plugin assembly is not start with "Nop"

Finally I am able to solve this, just add line below to your ConfigureServices where you inherit INopStartup in your custom plugin, it will solve the issue:

    //register validator
    services.AddTransient<IValidator<CustomRegisterModel>, RegisterValidator>();



overall code will be as below:

/// <summary>
        /// Add and configure any of the middleware
        /// </summary>
        /// <param name="services">Collection of service descriptors</param>
        /// <param name="configuration">Configuration root of the application</param>
        //public void ConfigureServices(IServiceCollection services, IConfigurationRoot configuration)
        public void ConfigureServices(IServiceCollection services, IConfiguration configuration)
        {
          

            //register validator
            services.AddTransient<IValidator<CustomRegisterModel>, RegisterValidator>();


        }

I have raised the issue regarding fluent validation not being registered on github: https://github.com/nopSolutions/nopCommerce/issues/3960

Finally I am able to solve this, just add line below to your ConfigureServices where you inherit INopStartup in your custom plugin, it will solve the issue:

    //register validator
    services.AddTransient<IValidator<CustomRegisterModel>, RegisterValidator>();



overall code will be as below:

/// <summary>
        /// Add and configure any of the middleware
        /// </summary>
        /// <param name="services">Collection of service descriptors</param>
        /// <param name="configuration">Configuration root of the application</param>
        //public void ConfigureServices(IServiceCollection services, IConfigurationRoot configuration)
        public void ConfigureServices(IServiceCollection services, IConfiguration configuration)
        {
          

            //register validator
            services.AddTransient<IValidator<CustomRegisterModel>, RegisterValidator>();


        }

Hey, This is working perfectly.
Thank you for sharing.