```  private static Lazy<bool> useManagedSNIOnWindows= new Lazy<bool>(               () => bool.TrueString.Equals(Environment.GetEnvironmentVariable("System.Data.SqlClient.UseManagedSNIOnWindows"), StringComparison.InvariantCultureIgnoreCase)  );  public static bool UseManagedSNI => useManagedSNIOnWindows.Value;  ```