'UnityEngine.Vector2' does not contain a constructor that takes '1' arguments. error CS1729 How to Fix?

I'm just starting to code in C# and general and I keep on having this compile error and I don't know how to fix it. If any one is able to help that would be very appreciated. :)

using UnityEngine; using System.Collections;

public class PlayerControls : MonoBehaviour {

 public float moveSpeed;

 private Animator anim;

 private bool playerMoving;
 private Vector2 lastMove;

 // Use this for initialization
 void Start () {
     anim = GetComponent<Animator>();
 
 }
 
 // Update is called once per frame
 void Update () {
 
     playerMoving = false;

     if (Input.GetAxisRaw ("Horizontal") > 0.5f || Input.GetAxisRaw("Horizontal") < -0.5f )
     {
         transform.Translate (new Vector3 (Input.GetAxisRaw ("Horizontal") * moveSpeed * Time.deltaTime, 0f, 0f));
         playerMoving = true;
         lastMove = new Vector2 (Input.GetAxisRaw ("Horizontal"));
     }

     if (Input.GetAxisRaw ("Vertical") > 0.5f || Input.GetAxisRaw("Vertical") < -0.5f )
     {
         transform.Translate (new Vector3 (0f, Input.GetAxisRaw ("Vertical") * moveSpeed * Time.deltaTime, 0f));
         playerMoving = true;
         lastMove = new Vector2 (Input.GetAxisRaw ("Vertical"));
     }
 
     anim.SetFloat ("MoveX", Input.GetAxisRaw ("Horizontal"));
     anim.SetFloat ("MoveY", Input.GetAxisRaw ("Vertical"));
     anim.SetBool ("PlayerMoving", playerMoving);
     anim.SetFloat ("LastMoveX", lastMove.x);
     anim.SetFloat ("LastMoveY", lastMove.y);
 }

}