URL Encode and Decode in ASP.NET Core

Question

HttpContext.Current.Server.UrlEncode

This does only work in .NET Framework. How can I encode or decode URI arguments in ASP.NET Core?

There is no HttpContext in ASP.NET Core - or any non-Web project. The same method is available through the methods of the Uri class, eg Uri.EscapeDataString, Uri.EscapeUriString — Panagiotis Kanavos
@PanagiotisKanavos WRONG - There is no HttpContext.Current but HttpContext is a part of .Net Core - Microsoft.AspNetCore.Http.HttpContext. Remember this — J. Doe
Remember to read the entire comment. The HttpContext you mention is VERY different from the HttpContext of previous versions. It's far more common to use the Uri methods — Panagiotis Kanavos
Possible duplicate of WebUtility.HtmlDecode replacement in .NET Core — Win

Set Set · Accepted Answer · 2017-07-05T08:46:42

For ASP.NET Core 2.0+ just add System.Net namespace - WebUtility class is shipped as part of System.Runtime.Extensions nuget package, that is referenced by default in ASP.NET Core project.
For the previous version add Microsoft.AspNetCore.WebUtilities nuget package.

Then the WebUtility class will be available for you:

public static class WebUtility
{
    public static string UrlDecode(string encodedValue);
    public static string UrlEncode(string value);
}