C# MySQL store BLOB

I needed to store a BLOB into a MySQL Database.

INSERT INTO `mytable` (`mycolumn1`, `mycolumn2`)
VALUES ('myValue1', @objectData);

_conn = new MySqlConnection();
_conn.ConnectionString = "MyConnectionString";
                   

// You must open the connection before Prepare()

_conn.Open();
 
MySqlCommand nonQueryCommand = new MySqlCommand(query, _conn);
 
nonQueryCommand.Prepare();

// Add parameter. myObjectData is my BLOB from C#
nonQueryCommand.Parameters.AddWithValue("@objectData", myObjectData);
 
nonQueryCommand.ExecuteNonQuery();
_conn.Close();