Check distance for Walkie (NavMeshAgent)

Hi,

I'm always trying to check before walking at the set points. (Using NavMeshAgent),
But I wanted check every step if it is not far to walk using the NavMeshAgent.

Code (CSharp):

1.  float dist = Vector3.Distance(path[currentPoint].position, transform.position);
2.         float distPlayer = Vector3.Distance(player.transform.position, transform.position);
3.  
4.        
5.         if (distPlayer < 50 ) {
6.  
7.             navcomponent.speed = speed;
8.             navcomponent.SetDestination(path[currentPoint].transform.position);          
9.  
10.  
11.             if (dist <= reach)
12.             {
13.                 currentPoint++;
14.             }
15.  
16.             if (currentPoint >= path.Length)
17.             {
18.                 currentPoint = 0;
19.             }
20.         }
21.         else
22.         {
23.  
24.         }

But, after he walks, he just checks when he arrives on the spot (until he's farther away than he should),
I know I told him to go using the:
navcomponent.SetDestination(path[currentPoint].transform.position);

I already tried to use SamplePosition, but failed.

I needd help