Visual Studio 2019 with Sonar Lint 6.1.0.45943 displays lots and lots of S1172 false alarms, since a few days. Here is an example that SonarLint flags with unused parameters:
private static string MakePropertyKey(string prefix, string propertyName)
{
return (String.IsNullOrEmpty(prefix)) ? propertyName : prefix + "." + propertyName;
}