Some fixes and support for more than 2 voices

VocaluxeLib/Extensions.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace VocaluxeLib
+{
+    public static class Extensions
+    {
+        /// <summary>
+        /// Resizes the given list to the given size. Removes elements or adds default values
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="list"></param>
+        /// <param name="size"></param>
+        /// <param name="defaultValue"></param>
+        public static void Resize<T>(this List<T> list, int size, T defaultValue = default(T))
+        {
+            int curSize = list.Count;
+            if (size < curSize)
+                list.RemoveRange(size, curSize - size);
+            else if (size > curSize)
+                list.AddRange(Enumerable.Repeat(defaultValue, size - curSize));
+        }
+
+        /// <summary>
+        /// Makes the list at least the given size adding the given default values.
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="list"></param>
+        /// <param name="size"></param>
+        /// <param name="defaultValue"></param>
+        public static void EnsureSize<T>(this List<T> list, int size, T defaultValue)
+        {
+            int curSize = list.Count;
+            if (size > curSize)
+                list.AddRange(Enumerable.Repeat(defaultValue, size - curSize));
+        }
+
+        /// <summary>
+        /// Makes the list at least the given size adding a new instance of T
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="list"></param>
+        /// <param name="size"></param>
+        public static void EnsureSize<T>(this List<T> list, int size) where T : new()
+        {
+            if (size > list.Count)
+                list.Add(new T());
+        }
+    }
+}