Kindly convert the below code into the .netcore 6.0 

public class TestRequestValidator : RequestValidator
 {
     protected override bool IsValidRequestString(HttpContext context, string value, RequestValidationSource requestValidationSource, string collectionKey, out int validationFailureIndex)
     {
         bool result = base.IsValidRequestString(context, value, requestValidationSource, collectionKey, out validationFailureIndex);

         if (!result)
         {
             if (requestValidationSource == RequestValidationSource.QueryString)
                 return true;
         }
         return result;
     }
 }