Or is it just simply

player.Command("ddraw 0,0,0 10,10,10");

or something like that?

Also would orther players be able to see the line, or is it local?

public void Line(BasePlayer player, Vector3 from, Vector3 to, Color color, float duration) {
   player.SendConsoleCommand("ddraw.line", duration, color, from, to);
}

Found that from an old github post. opcause SendConsoleCommand should just be Command, but else would it work?

I've noticed its possible to attach costom made componats (aka class' that devrive from MonoDevelop)

But how exactly? how would I attach a componant to a player gameobject?
I mean really I just need a refrence to a players gameobject so BasePlayer.gameobject.AddComponant?

No, there is no way to bypass it. And there is no need to bypass it. You can make player an admin, send him a debug draw command, and then disable admin flag.

            player.SetPlayerFlag(BasePlayer.PlayerFlags.IsAdmin, true);
            player.SendConsoleCommand("whatever you want");
            player.SetPlayerFlag(BasePlayer.PlayerFlags.IsAdmin, false);

Also how save is this method? I mean if the hook crashes mid way thorgh the player would be stuck as admin...

I guess resetting the flag right after the sendconsolecommand and then reseting it a seccound or two after on a timer might make me a bit less paranoid.

But thanks for showing me that SetPlayerFlag thing I didn't know about that one. Would be easyer if there was documentation for the BasePlayer class, and all the orther classes like that one (as BaseEntity, ect) but as I understand it there aren't. But I guess nobody got time to write documentation about evreything...

public void Line(BasePlayer player, Vector3 from, Vector3 to, Color color, float duration)
        {
            player.SetPlayerFlag(BasePlayer.PlayerFlags.IsAdmin, true);
            player.SendConsoleCommand("ddraw.line", new object[] { duration, color, from, to });
            
            if (player.IPlayer.Id == "my steam id") //to not remove my charectors admin when I'm ingame
            {
                
            }
            else
            {
                player.SetPlayerFlag(BasePlayer.PlayerFlags.IsAdmin, false);
            }

        }

public void Line(BasePlayer player, GenericPosition from, GenericPosition to, Color color, float duration)
        {
            Line(player, new Vector3(from.X, from.Y, from.Z), new Vector3(to.X, to.Y, to.Z), color, duration);
        }


Color color = Color.Red;
Iplayer target = sometarget;
BasePlayer = somebaseplayer;
Line(player, player.IPlayer.Position(), target.Position(), color, 9.99f);

Is what I got. But sadly it still doesn't work for non-admins, I assume its because the admin flag is set to false before the client resive and execute the command