Sql Server Version Finder using Value Tuples in C# Version 8

Here is an example of using the new tuples in Version 8 of the C# compiler. I've tried to use these tuples in a way which makes them as readable as possible.

public class SqlVersionFinder
{
  public (string version, string date, string copyright, string edition)
                          GetSqlVersion(string server = @".\")
  {
    // Use named arguments so that the tuple is easy to read and maintain
    var res = (version: "", date: "", copyright: "", edition: "");

    using (var connection = new SqlConnection(String.Format(
        "Server={0};Database=master;Trusted_Connection=True;",
         server)))
    {
      connection.Open();
      var sqlResult = "";

      using (var command = connection.CreateCommand())
      {
        command.CommandText = " SELECT @@VERSION";
        sqlResult = command.ExecuteScalar() as string ?? "";
      }
      if (!string.IsNullOrEmpty(sqlResult))
      {
        var versionInfo = sqlResult.Split(new[] { "\n\t" }, 
                            System.StringSplitOptions.None);
        if (versionInfo != null && versionInfo.Length >= 4)
        {
           res.version = versionInfo[0] ?? "";
           res.date = versionInfo[1] ?? "";
           res.copyright = versionInfo[2] ?? "";
           res.edition = versionInfo[3] ?? "";
        }
      }
    }
    return res;
  }
}

Here is the test code (from a Console app) that retrieves Sql Server Version information

SqlVersionFinder sqlVersionFinder = new SqlVersionFinder();
var res = sqlVersionFinder.GetSqlVersion();
Console.WriteLine("Version:   " + res.version);
Console.WriteLine("Date:      " + res.date);
Console.WriteLine("Copyright: " + res.copyright);
Console.WriteLine("Edition:   " + res.edition);

Output looks like this:

Version: Microsoft SQL Server 2016 (RTM) - 13.0.1601.5 (X64)
Date: Apr 29 2016 23:23:58
Copyright: Copyright (c) Microsoft Corporation
Edition: Standard Edition (64-bit) on Windows 10 Enterprise 6.3 (Build 17134: )