dotnet-core/release-notes/3.0/api-diff/Asp.Net/3.0.0_Microsoft.AspNetCore.Server.HttpSys.md

Microsoft.AspNetCore.Server.HttpSys

 {
     namespace Microsoft.AspNetCore.Server.HttpSys {
         public static class HttpSysDefaults {
-            public static readonly string AuthenticationScheme;
+            public const string AuthenticationScheme = "Windows";
         }
     }
 }