Insert Html Pages To MySQL - Error "check Manual That Corresponds To MySQL Server Version For The Right Syntax"

I am trying to insert html pages to MySQL with my Asp.NET project but i am getting error; You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'de Osman patlaması', '', '<div style="text-align: center"> <img src="/i' at line 1

How can i fix that problem my server side code is;

MySqlConnection myCon = new MySqlConnection();
myCon.ConnectionString = ConfigurationManager.ConnectionStrings["MySQLConnectionString"].ConnectionString;
MySqlCommand cmd = new MySqlCommand();
cmd.CommandType = CommandType.Text;
string query = @"INSERT INTO `test`.`posts` (`id`, `author`, `title`, `description`, `content`, `ispublished`, `iscommentsenabled`, `pubDate`, `lastModified`, `raters`, `rating`, `slug`, `tags`, `categories`) VALUES (NULL, '{0}', '{1}', '{2}', '{3}', '{4}', '{5}', '{6}', '{7}', '{8}', '{9}', '{10}', '{11}', '{12}')";
query = String.Format(query, p.author, p.title, p.description, p.content, p.ispublished, p.iscommentsenabled, p.pubDate, p.lastModified, p.raters, p.rating, p.slug, p.tags, p.categories);
cmd.CommandText = query;
cmd.Connection = myCon;
cmd.Connection.Open();
cmd.ExecuteNonQuery();
cmd.Connection.Close();..............