RetryPolicy.cs

var policies = Policy
    .Handle<MySqlException>(x => x.IsFailoverException())
    .WaitAndRetry(5,
        retry => TimeSpan.FromSeconds(retry * 5),
        (a, b) =>
        {
            var mySqlEx = a as MySqlException;

            Log.Logger.Warning(
                "Failed with: {@error}. Retrying in {x} seconds...",
                new
                {
                    Msg = mySqlEx.Message,
                    Number = mySqlEx.Number,
                    HR = mySqlEx.HResult
                },
                b.TotalSeconds);
        });