CS0103 The name 'List' does not exist in the current context

I was coding on one computer then i switched to laptop and suddenly i have an error which i can't for the life of me figure out what is going wrong. The error is the title,

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 
 
 public class MultiplayerManager : MonoBehaviour
 {
 
         public static MultiplayerManager instance;
         public string PlayerName;
         private string MatchName = "";
         private string MatchPassword = "";
         private int MatchMaxUsers = 32;
         public List<MPPlayer> PlayerList = new List<MPPlayer> ();
  
 
         void Start ()
         {
                 instance = this;
 
         }
 
         public void StartServer (string servername, string serverpassword, int maxusers)
         {
                 MatchName = servername;
                 MatchPassword = serverpassword;
                 MatchMaxUsers = maxusers;
                 Network.InitializeServer (MatchMaxUsers, 2550, false);
                 Network.InitializeSecurity ();
 
         }
 
         void OnServerInitialized ()
         {
         Server_PlayerJoinRequest ("", Network.player);
         }
 
         void OnConnectedToServer ()
         {
         networkView.RPC ("Server_PlayerJoinRequest", RPCMode.Server,"", Network.player);
         }
 
         void OnPlayerDisconnected (NetworkPlayer id)
         {
                 networkView.RPC ("Client_RemovePlayer", RPCMode.All, id);
         }
 
         [RPC]
         void Server_PlayerJoinRequest (string playername, NetworkPlayer view)
         {
         networkView.RPC ("Client_AddPlayerToList", RPCMode.All, playername, view);
         }
 
         [RPC]
         void Client_AddPlayerToList (string playername, NetworkPlayer view)
         {
                 MPPlayer tempplayer = new MPPlayer ();
                 tempplayer.PlayerName = playername;
                 tempplayer.PlayerNetwork = view;
                 PlayerList.Add (tempplayer);
         }
 
         [RPC]
         void Client_RemovePlayer (NetworkPlayer view)
         {
                 MPPlayer temppl = null;
                 foreach (MPPlayer pl in PlayerList) {
                         if (pl.PlayerNetwork = view) {
                                 temppl = pl;
                         }
                 }
                 if (temppl != null) {
                         PlayerList.Remove (temppl);
                 }
         }
 
 }
 
 public class MPPlayer
 {
         public string PlayerName = "";
         public NetworkPlayer PlayerNetwork;
 
 
 }