URL Encode and Decode in ASP.NET Core

Question

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);
}