Used UriHelper to parse url and get query

Author: Dona278

src/Components/WebAssembly/Server/src/TargetPickerUi.cs

@@ -10,6 +10,7 @@
 using System.Text.Json;
 using System.Text.Json.Serialization;
 using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Http.Extensions;
 using System.Dynamic;
 
 namespace Microsoft.AspNetCore.Components.WebAssembly.Server;
@@ -388,8 +389,8 @@ static string NormalizeDevtoolsFrontendUrl(string devtoolsFrontendUrl)
                 return devtoolsFrontendUrl;
             }
 
-            string queryString = devtoolsFrontendUrl[devtoolsFrontendUrl.IndexOf('?')..];
-            return $"{DefaultBrowserDevToolsPagePath}?{queryString}";
+            UriHelper.FromAbsolute(url, out _, out _, out _, out var query, out _);
+            return $"{DefaultBrowserDevToolsPagePath}{query}";
         }
     }