Little Registry Cleaner/Common Tools/TaskScheduler/TriggerCollection.cs

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using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;

namespace Common_Tools.TaskScheduler
{
	/// <summary>
	/// Provides the methods that are used to add to, remove from, and get the triggers of a task.
	/// </summary>
	public sealed class TriggerCollection : IEnumerable<Trigger>, IDisposable
	{
		private V1Interop.ITask v1Task = null;
		private V2Interop.ITaskDefinition v2Def = null;
		private V2Interop.ITriggerCollection v2Coll = null;

		internal TriggerCollection(V1Interop.ITask iTask)
		{
			v1Task = iTask;
		}

		internal TriggerCollection(V2Interop.ITaskDefinition iTaskDef)
		{
			v2Def = iTaskDef;
			v2Coll = v2Def.Triggers;
		}

		/// <summary>
		/// Releases all resources used by this class.
		/// </summary>
		public void Dispose()
		{
			if (v2Coll != null) Marshal.ReleaseComObject(v2Coll);
			v2Def = null;
			v1Task = null;
		}

		/// <summary>
		/// Gets the collection enumerator for this collection.
		/// </summary>
		/// <returns>The <see cref="IEnumerator{T}"/> for this collection.</returns>
		public IEnumerator<Trigger> GetEnumerator()
		{
			if (v1Task != null)
				return new V1TriggerEnumerator(v1Task);
			return new V2TriggerEnumerator(v2Coll);
		}

		System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
		{
			return this.GetEnumerator();
		}

		internal sealed class V1TriggerEnumerator : IEnumerator<Trigger>
		{
			private V1Interop.ITask iTask;
			private short curItem = -1;

			internal V1TriggerEnumerator(V1Interop.ITask task)
			{