Avoid list out of range errors

Scripting
1

Hi i try to do two simple checks:

//EVENTS VARIABLES
	int EventNumber=0;
	public List<string> Message;
	public float[] waypointXValue;
	public float[] waypointWaitingTime;
	public string[] waypointAnimation;

if(     <check array not out of range>      || Message[EventNumber] != "")

{
// enter in this only if Message.length<EventNumber and Message[EventNumber] is not empty
}

ArgumentOutOfRangeException: Argument is out of range.
Parameter name: index
System.Collections.Generic.List`1[System.String].get_Item (Int32 index)
NPCControlTrigger+<EventManager>c__Iterator15.MoveNext () (at Assets/GameContent/PostcompileScripts/Trigger/NPCControlTrigger.cs:61)
UnityEngine.MonoBehaviour:StartCoroutine(String)
NPCControlTrigger:Move() (at Assets/GameContent/PostcompileScripts/Trigger/NPCControlTrigger.cs:91)
NPCControlTrigger:Update() (at Assets/GameContent/PostcompileScripts/Trigger/NPCControlTrigger.cs:117)

How to check this properly?

2 
if(Message.Count>EventNumber)
		{
			if(Message[EventNumber] == "")
			{
				Debug.Log ("no message for event "+EventNumber);
			}
			else
			{
				//label have value
			}
		}

found out the solution, just replace the list[int] i checked by a list.count