Added modbus-proxy CLI tool

CliProxy/Cli/EnumerableWalker.cs

@@ -0,0 +1,53 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace AMWD.Common.Cli
+{
+	/// <summary>
+	/// Walks through an <see cref="IEnumerable{T}"/> and allows retrieving additional items.
+	/// </summary>
+	/// <typeparam name="T"></typeparam>
+	/// <remarks>
+	/// Initialises a new instance of the <see cref="EnumerableWalker{T}"/> class.
+	/// </remarks>
+	/// <param name="array">The array to walk though.</param>
+	internal class EnumerableWalker<T>(IEnumerable<T> array)
+		: IEnumerable<T> where T : class
+	{
+		private readonly IEnumerable<T> _array = array ?? throw new ArgumentNullException(nameof(array));
+		private IEnumerator<T> _enumerator;
+
+		IEnumerator<T> IEnumerable<T>.GetEnumerator()
+		{
+			_enumerator = _array.GetEnumerator();
+			return _enumerator;
+		}
+
+		/// <summary>
+		/// Gets the enumerator.
+		/// </summary>
+		/// <returns>The enumerator.</returns>
+		public IEnumerator GetEnumerator()
+		{
+			_enumerator = _array.GetEnumerator();
+			return _enumerator;
+		}
+
+		/// <summary>
+		/// Gets the next item.
+		/// </summary>
+		/// <returns>The next item.</returns>
+		public T GetNext()
+		{
+			if (_enumerator.MoveNext())
+			{
+				return _enumerator.Current;
+			}
+			else
+			{
+				return default;
+			}
+		}
+	}
+}