Tutorial Script: Chat manager

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class ChatManager : MonoBehaviour
{
    public List<ChatMessage> chatMessages = new List<ChatMessage>();
    public bool IsWriting;
    public string currentText;

    void Update()
    {
        if (Input.GetKeyDown(KeyCode.T))
        {
            IsWriting = true;
            currentText = "";
        }
    }

    void OnGUI()
    {
        if (IsWriting || chatMessages.Count > 0)
        {
            GUILayout.BeginArea(new Rect(10, Screen.height / 2 - 150, 200, 300), "", "box");

            foreach (ChatMessage mes in chatMessages)
            {
                GUILayout.BeginHorizontal();
                GUILayout.Label(mes.owner.PlayerName);
                GUILayout.Label(mes.message);
                GUILayout.EndHorizontal();
            }

            GUILayout.EndArea();
        }
        if (IsWriting)
        {
            currentText = GUI.TextField(new Rect(10, Screen.height / 2 + 130, 200, 30), currentText);
            if (Event.current.Equals (Event.KeyboardEvent ("return")))
            {
                IsWriting = false;
                networkView.RPC("GetMessage", RPCMode.All, Network.player, currentText);
            }
        }
    }

    [RPC]
    void GetMessage(NetworkPlayer player, string Message)
    {
        ChatMessage tempmessage = new ChatMessage();
        tempmessage.owner = MultiplayerManager.GetMPPlayer(player);
        tempmessage.message = Message;
        chatMessages.Add(tempmessage);
        StartCoroutine(RemoveChatMessage(tempmessage));
    }

    IEnumerator RemoveChatMessage(ChatMessage mes)
    {
        yield return new WaitForSeconds(7.5f);
        chatMessages.Remove(mes);
    }
}

[System.Serializable]
public class ChatMessage
{
    public MPPlayer owner;
    public ChatForPeople forPeople;
    public string message;
}

public enum ChatForPeople
{
    Everybody,
    Team,
    SpecificPerson
}