Asynchronous Multi-threaded ObservableCollection

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Threading;
using CollectionMtLib;

namespace WpfTestObservableCollectionMt
{
	public class MainWindowModel
	{
		public CollectionMtWithAsyncObservableCollectionReadOnlyCopy<string> ObsCollMt { private set; get; }

		public MainWindowModel()
		{
			ObsCollMt = new CollectionMtWithAsyncObservableCollectionReadOnlyCopy<string>();
		}

		public void RunTest()
		{
			for (int n = 0; n < 10; n++)
			{
				Task.Factory.StartNew(ModifyCollectionRandom);
			}
		}

		static Random rnd = new Random();

		private void ModifyCollectionRandom()
		{
			while(true)
			{
				int rndNumber = rnd.Next(100);
				if (rndNumber > 95)
				{
					// Give a break to the UI to show data, otherwise it will only process collection related messages 
					// without having time to process rendering messages than are in lower priority.
					Thread.Sleep(1000);		
				}
				if (rndNumber > 30)
				{
					ObsCollMt.Add(rndNumber.ToString(CultureInfo.InvariantCulture));
				}
				else if (rndNumber > 0)
				{
					lock (ObsCollMt.SyncRoot)
					{
						if (ObsCollMt.Count > 0)
						{
							ObsCollMt.UnsafeRemoveAt(0);
						}
					}
				}
				else
				{ 
					ObsCollMt.Clear();
				}
			}
		}
	}
}