TypeLoadException with libraries in C#

Questions & Answers
1

Hello, I’ve searched the internet for the past 2 days to find out myself, but I didn’t find anything useful or up to date for my problem, so here it is:

I am currently working on a 2D MMORPG nothing really too important, but the thing is, I want to connect to the database, (what actually should work)
But I happen to have this strange error, (I can actually start the game tho).

Here’s the beginning of the DB.cs (where the database stuff is)

Unable to see screenshot, errocode below

Error:

TypeLoadException: Could not load type ‘System.Data.SqlClient.SqlConnection’ from assembly ‘System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089’.

using UnityEngine;
using System.Collections;
using System.Data;
using MySql.Data.MySqlClient;

If you need any other codelines tell me.

2

See:

http://docs.unity3d.com/Documentation/ScriptReference/MonoCompatibility.html

The runtime Mono support does not include System.Data.