title: assign the variable with MySql
body: <p>I want to assign my variable [vPrenom_id_obtenu] by the value that I get in my MySql DB ...
  With the following code, I receive an error message :</p>
  
  <blockquote>
    <p>does not contain a definition for 'ExecuteScalar' ....</p>
  </blockquote>
  
  <pre><code>string vFistNam_id_get;
  string connDataBaseStr = "server=myserver;user=####;database=myDataBase;port=3306;password=dsdfsdfsdf123;";
  string sqlDataBaseSelect = "SELECT column_fistname_id FROM table_identy WHERE column_famillyname='" + vFamillyName + "'";
  
  MySqlConnection connDataBase = new MySqlConnection(connDataBaseStr); 
  connDataBase.Open();
  vFistNam_id_get = (string)connDataBase.ExecuteScalar();
  connDataBase.Close();
  </code></pre>
  
  <p>How can I retrieve the value that is in "column_fistname_id"?
  The type of two columns of my table</p>
  
  <p>Le type de deux colonnes de ma table [column_fistname_id] and [column_famillyname] is «text'.</p>