NavMeshAgent.SetDestination(); does not take Vector3?

Soo, i was "rebuilding" an example script in C#... well, this one:

Code (CSharp):

1. public class NavMeshAgent : MonoBehaviour {
2.  
3.     [SerializeField]
4.     Transform _destination;
5.  
6.     NavMeshAgent _navMeshAgent;
7.  
8.     // Use this for initialization
9.     void Start ()
10.     {
11.         _navMeshAgent = this.GetComponent<NavMeshAgent>();
12.  
13.         if (_navMeshAgent == null)
14.         {
15.             Debug.LogError("Nav mesh agent not attached to Component " + gameObject.name);
16.         }
17.         else
18.         {
19.             SetVector();
20.         }
21.     }
22.  
23.     private void SetVector()
24.     {
25.         if (_destination != null)
26.         {
27.             Vector3 targetVector = _destination.transform.position;
28.             _navMeshAgent.SetDestination(targetVector);
29.         }
30.     }
31. }

And Visual Studio Points out that no overload of this Method takes 1 Argument. (would be line 28 here)
So, i am a bit confused, because i cannot compile the script and the "error" is kind of against the logic presented in the documentation.
Well, up to this point i am kind of screwed.

I hope someone can point out what is going on / wrong because it does absolutely make no sense to me whatsoever.

Thanks for your time.

Felix

 

Closed for being dumb... Yeah, naming is important, i get it