ConvertDataTypes.cs

private object ConvertDataTypes(object col)
{
    if (col == null)
        return "NULL";

    switch (col.GetType().FullName)
    {
        case "System.Int16":
        case "System.Int32":
        case "System.Int64":
        case "System.UInt16":
        case "System.UInt32":
        case "System.UInt64":
        case "System.Byte":
        case "System.SByte":
        case "System.Single":
        case "System.Double":
        case "System.Decimal":
        case "System.Boolean":
            return col;
        case "System.DBNull":
            return "NULL";
        case "System.Guid":
        case "System.String":
            return $"\"{col.ToString().Replace("\"", "\\\"").Replace("'", "\\'")}\"";
        case "System.DateTime":
            return $"\"{((DateTime)col).ToString("yyyy-MM-dd HH:mm:ss")}\"";
        case "System.Byte[]":
            return "0x" + BitConverter.ToString((byte[])col).Replace("-", "");
    }
    return col;
}