Add project files.

SacsStandardBase/Base/Core/StackLimited.cs

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+using System.Collections.Generic;
+
+namespace Sarand.Net.Standard.Base.Core
+{
+	//=======================================================================
+	/// <summary>
+	/// Stack (LIFO) with limit on length.
+	/// </summary>
+	/// <typeparam name="ITEM"></typeparam>
+	public class StackLimited<ITEM>
+	{
+		//-------------------------------------------------------------------
+		// Data members.
+		private int limit = 0;
+		private readonly LinkedList<ITEM> items = new LinkedList<ITEM>();
+		//-------------------------------------------------------------------
+		// Construction.
+		public StackLimited (int limit = 0)
+		{
+			this.limit = limit;
+		}
+		//-------------------------------------------------------------------
+		// Utilities.
+		public int Count
+		{
+			get { return items.Count; }
+		}
+		public void Clear ()
+		{
+			items.Clear();
+		}
+		//-------------------------------------------------------------------
+		/// <summary>
+		/// Add item to the stack and ensure limit isn't exceeded.
+		/// </summary>
+		/// <param name="item"></param>
+		public void Push (ITEM item)
+		{
+			items.AddFirst(item);
+			while (limit > 0 && items.Count > limit)
+				items.RemoveLast();
+		}
+		//-------------------------------------------------------------------
+		/// <summary>
+		/// Retrieve and remove last item added to the stack.
+		/// </summary>
+		/// <returns></returns>
+		public ITEM Pop ()
+		{
+			ITEM item = items.First.Value;
+			items.RemoveFirst();
+			return item;
+		}
+		//-------------------------------------------------------------------
+	}
+	//=======================================================================
+}