Try InvariantCulture #172 - #174

                Values.ForEach(item => { sqlvalues += "N'" + item + "',"; });
            else
                if (valueType == IS_DATE)
                {
                    Values.ForEach(item =>
                    {
                        if (DateTime.TryParse(item, CultureInfo.InvariantCulture, DateTimeStyles.None, out var dt))
                        {
                            sqlvalues += "'" + dt.ToString("yyyyMMddTHH:mm:ss.fff") + "',";
                        }
                        else
                        {
                            sqlvalues += "N'" + item + "',";
                        }
                    });
                }
            else
                    if (valueType == IS_UNIQUE)
                Values.ForEach(item => { sqlvalues += "'{" + item + "}',"; });
@@ -133,7 +147,16 @@ public string ToSqlAlter()
                    sqlmergue += "N'" + item + "'";
                else
                    if (valueType == IS_DATE)
                    {
                        if (DateTime.TryParse(item, CultureInfo.InvariantCulture, DateTimeStyles.None, out var dt))
                        {
                            sqlmergue += "'" + dt.ToString("yyyyMMddTHH:mm:ss.fff") + "'";
                        }
                        else
                        {
                            sqlmergue += "N'" + item + "'";
                        }
                    }
                else
                        if (valueType == IS_UNIQUE)
                    sqlmergue += "'{" + item + "}'";
@@ -152,7 +175,20 @@ public string ToSqlAlter()
                    sqsplit += "N'" + item + "'";
                else
                    if (valueType == IS_DATE)
                    {
                        if (DateTime.TryParse(item, CultureInfo.InvariantCulture, DateTimeStyles.None, out var dt))
                        {
                            sqsplit += "'" + dt.ToString("yyyyMMddTHH:mm:ss.fff") + "'";
                        }
                        else
                        {
                            sqsplit += "N'" + item + "'";
                        }
                    }
                else
                        if (valueType == IS_UNIQUE)
                    sqsplit += "'{" + item + "}'";