how to assign mesh.vertices ToList linq extension

this doesnt work:

var mesh2 : Mesh = child.gameObject.GetComponent(MeshFilter).mesh;
    
var vtxlist = new List.<Vector3>(); 
var vtx2 = mesh2.vertices; 
vtxlist = vtx2.ToList(); 

Assets/morphgen/Models/-=Norm.js(287,127): BCE0019: ‘ToList’ is not a member of ‘UnityEngine.Vector3’.

import System.Collections.Generic;
import System.Linq;