# Microsoft.AspNetCore.Mvc.Routing

``` diff
 namespace Microsoft.AspNetCore.Mvc.Routing {
     public abstract class UrlHelperBase : IUrlHelper {
-        public virtual bool IsLocalUrl([NotNullWhenAttribute(true)] string? url);
+        public virtual bool IsLocalUrl([NotNullWhenAttribute(true), StringSyntaxAttribute("Uri")] string? url);
     }
 }
```

