Step by step migration of ASP.NET Core 2.2 to 3.1

In order to upgrade/migrate core version to 3.1 following steps to be perform. Download and install Visual Studio 2019 version 16.4 or higher. Download and install .NET Core 3.1 Upgrade the projects of solution to .NET Core 3.1 , because ASP.NET Core 3.1 requires it. Update existing Nuget packages to a version compatible with ASP.NET Core 3.1 in each project Use IHost interface from a IHostBuilder instead of building and running a IWebHost from a IWebHostBuilder in Program.cs public static IHostBuilder CreateWebHostBuilder(string[] args) => Host.CreateDefaultBuilder(args) .ConfigureWebHostDefaults(webBuilder => { webBuilder.UseKestrel() .UseSerilog() .UseStartup<Startup>(); }) Change AddMvc method has been replaced by AddControllers in Startup.cs of each projects. In Startup.cs, UseMvc method to b

Email validation using regular expression in jQuery

To validate user input for email-id it's very easy using regular expressions. Using regular expressions you do not need to write lengthy logical code in jQuery. Following are the steps to do the same.

  • Pass a string to RegExp or create a regex using the //syntax
  • Call regex.test(string)
So code would be...
jQuery(function () {
    $(".mail").keyup(function () {
        var VAL = this.value;

        var email = new RegExp('^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$');

        if (email.test(VAL)) {
            alert('Great, you entered an valid E-Mail-address');


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