how to get all points along a mesh

Hi all; I have a problem at the moment in which I'm trying to get all the points along a mesh object I've created using a c# script. Any advise will be greatly received. Here is the screenshot of the mesh:

Code to do all this:

 using UnityEngine;
 using System.Collections;
 
 public class CreatePlaneMesh : MonoBehaviour {
 
     public float width = 50f;
     public float height = 50f;
 
     public Material mat; // material variabl
 
     // Use this for initialization
     void Start () {
         gameObject.AddComponent<MeshFilter>();
         MeshFilter mf = GetComponent<MeshFilter>();
         Mesh mesh = new Mesh();
         mf.mesh = mesh;
 
 
 
         //vertices
         Vector3[] vertices = new Vector3[4]; //create 4 slots to store vectors to create plane
 
         vertices[0] = new Vector3 (width, 0, 0);
         vertices[1] = new Vector3 (width, 0, height);
         vertices[2] = new Vector3 (0, 0, height);
         vertices[3] = new Vector3 (0, 0, 0);
 
         mesh.vertices = vertices;
 
         //get all vertex positions of the mesh object
         mesh = GetComponent<MeshFilter>().mesh;
         Vector3[] v = mesh.vertices;
         int i = 0; while (i < v.Length){
             v[i]+= Vector3.up * Time.deltaTime;
             i++;
         }

     vector3[] worldPOS = new Vector3[4];
             for(int j=0; j < 4; j++) {
             worldPOS = new vector3(transform.Transformpoint(verices[j])));
 }


         mesh.vertices = vertices;
         mesh.RecalculateBounds();
         //
 
         
         int[] indices = new int[6];
         
         indices[0] = 0; indices[1] = 3; indices[2] = 2;
         indices[3] = 0; indices[4] = 2; indices[5] = 1;
 
         mesh.SetIndices(indices, MeshTopology.Triangles, 0);
 
         gameObject.AddComponent<MeshRenderer>();
         MeshRenderer mr = GetComponent<MeshRenderer>();
         mr.material.color = Color.green;
         mesh.RecalculateNormals();

Error message: The type 'UnityEngine.Vector3' does not contain a constructor that takes '1' arguments