ReactRouter extension method doesn't include "?" character for query string on .NET Framework

[rshackleton]

Thanks for filing a bug! To save time, if you're having trouble using the library, please check off the items you have tried. If you are just asking a question, skip right to the bottom.

Please verify these steps before filing an issue, and check them off as you go

• The relevant native JavascriptEngineSwitcher library packages are installed (such as JavaScriptEngineSwitcher.V8.Native.win-x64)
• The VC++ 2017 runtime is installed
• The value of SetUseReact and SetUseBabel is correct in ReactConfig.cs or Startup.cs
• I've looked at the sample projects in this repo to verify that my app is configured correctly

I'm using these library versions:

• ReactJS.NET: 5.2.11
• JavaScriptEngineSwitcher: 3.3.0
• react and react-dom: (N/A if using bundled react, or version number) 17.0.2
• webpack: (N/A if using bundled react) 4.44.1
• node: (N/A if using bundled react) 14.16.0

Runtime environment:

• OS: Windows 11 64-bit
• .NET Framework or .NET Core Version: .NET Framework 4.7.2

Steps to reproduce

The query string passed to the component when server-side rendering via the ReactRouter extension doesn't include a "?" character when run under .NET Framework whereas on .NET Core it does include it. This results in the path not including a valid query string, for example /newspageIndex=1 rather than /news?pageIndex=1.