Minor refactoring and cleaning

Removed unnecessary comments. Added string interpolation from C# 6.0.
Removed unneeded library references.

DarkUI/Collections/ObservableList.cs

@@ -40,20 +40,12 @@ namespace DarkUI
         {
             if (!_disposed)
             {
-                if (disposing)
-                {
-                    // Release managed resources
-                }
-
-                // Release unmanaged resources.
-                // Set large fields to null.
                 if (ItemsAdded != null)
                     ItemsAdded = null;
 
                 if (ItemsRemoved != null)
                     ItemsRemoved = null;
 
-                // Set disposed flag
                 _disposed = true;
             }
         }

DarkUI/Controls/DarkButton.cs

@@ -33,6 +33,7 @@ namespace DarkUI
                 Invalidate();
             }
         }
+
         public new bool Enabled
         {
             get { return base.Enabled; }

DarkUI/Controls/DarkListView.cs

@@ -208,7 +208,7 @@ namespace DarkUI
         public void SelectItem(int index)
         {
             if (index < 0 || index > Items.Count - 1)
-                throw new IndexOutOfRangeException(string.Format("Value '{0}' is outside of valid range.", index));
+                throw new IndexOutOfRangeException($"Value '{index}' is outside of valid range.");
 
             _selectedIndices.Clear();
             _selectedIndices.Add(index);
@@ -228,7 +228,7 @@ namespace DarkUI
             foreach (var index in list)
             {
                 if (index < 0 || index > Items.Count - 1)
-                    throw new IndexOutOfRangeException(string.Format("Value '{0}' is outside of valid range.", index));
+                    throw new IndexOutOfRangeException($"Value '{index}' is outside of valid range.");
 
                 _selectedIndices.Add(index);
             }
@@ -428,7 +428,6 @@ namespace DarkUI
             var top = range.Min();
             var bottom = range.Max();
 
-            // Draw items
             for (var i = top; i <= bottom; i++)
             {
                 var width = Math.Max(ContentSize.Width, Viewport.Width);
@@ -446,7 +445,7 @@ namespace DarkUI
                     g.FillRectangle(b, rect);
                 }
 
-                // Border
+                // DEBUG: Border
                 /*using (var p = new Pen(Colors.DarkBorder))
                 {
                     g.DrawLine(p, new Point(rect.Left, rect.Bottom - 1), new Point(rect.Right, rect.Bottom - 1));

DarkUI/Controls/DarkScrollBar.cs

@@ -205,7 +205,7 @@ namespace DarkUI
 
             if (_trackArea.Contains(e.Location) && e.Button == MouseButtons.Left)
             {
-                // Check if our input is at least aligned with the thumb
+                // Step 1. Check if our input is at least aligned with the thumb
                 if (_scrollOrientation == DarkOrientation.Vertical)
                 {
                     var modRect = new Rectangle(_thumbArea.Left, _trackArea.Top, _thumbArea.Width, _trackArea.Height);
@@ -219,7 +219,7 @@ namespace DarkUI
                         return;
                 }
 
-                // Step 1. Scroll to the area initially clicked.
+                // Step 2. Scroll to the area initially clicked.
                 if (_scrollOrientation == DarkOrientation.Vertical)
                 {
                     var loc = e.Location.Y;
@@ -235,7 +235,7 @@ namespace DarkUI
                     ScrollToPhysical(loc);
                 }
 
-                // Step 2. Initiate a thumb drag.
+                // Step 3. Initiate a thumb drag.
                 _isScrolling = true;
                 _initialContact = e.Location;
                 _thumbHot = true;
@@ -246,7 +246,6 @@ namespace DarkUI
                     _initialValue = _thumbArea.Left;
 
                 Invalidate();
-
                 return;
             }
         }

DarkUI/Controls/DarkTreeView.cs

@@ -163,13 +163,6 @@ namespace DarkUI
         {
             if (!_disposed)
             {
-                if (disposing)
-                {
-                    // Release managed resources
-                }
-
-                // Release unmanaged resources.
-                // Set large fields to null.
                 DisposeIcons();
 
                 if (SelectedNodesChanged != null)
@@ -187,11 +180,9 @@ namespace DarkUI
                 if (_selectedNodes != null)
                     _selectedNodes.CollectionChanged -= SelectedNodes_CollectionChanged;
 
-                // Set disposed flag
                 _disposed = true;
             }
 
-            // Call Dispose on your base class.
             base.Dispose(disposing);
         }
 
@@ -1159,7 +1150,7 @@ namespace DarkUI
                 if (node == dropNode)
                 {
                     if (isMoving)
-                        DarkMessageBox.ShowError(String.Format(@"Cannot move {0}. The destination folder is the same as the source folder.", node.Text), Application.ProductName);
+                        DarkMessageBox.ShowError($"Cannot move {node.Text}. The destination folder is the same as the source folder.", Application.ProductName);
 
                     return false;
                 }
@@ -1167,7 +1158,7 @@ namespace DarkUI
                 if (node.ParentNode != null && node.ParentNode == dropNode)
                 {
                     if (isMoving)
-                        DarkMessageBox.ShowError(String.Format(@"Cannot move {0}. The destination folder is the same as the source folder.", node.Text), Application.ProductName);
+                        DarkMessageBox.ShowError($"Cannot move {node.Text}. The destination folder is the same as the source folder.", Application.ProductName);
 
                     return false;
                 }
@@ -1178,7 +1169,7 @@ namespace DarkUI
                     if (node == parentNode)
                     {
                         if (isMoving)
-                            DarkMessageBox.ShowError(String.Format(@"Cannot move {0}. The destination folder is a subfolder of the source folder.", node.Text), Application.ProductName);
+                            DarkMessageBox.ShowError($"Cannot move {node.Text}. The destination folder is a subfolder of the source folder.", Application.ProductName);
 
                         return false;
                     }

DarkUI/Controls/Items/DarkListItem.cs

@@ -7,8 +7,11 @@ namespace DarkUI
         #region Property Region
 
         public string Text { get; set; }
+
         public Rectangle Area { get; set; }
+
         public Color TextColor { get; set; }
+
         public FontStyle FontStyle { get; set; }
 
         #endregion

DarkUI/Controls/Items/DarkTreeNode.cs

@@ -46,13 +46,17 @@ namespace DarkUI
         }
 
         public Rectangle ExpandArea { get; set; }
+
         public Rectangle IconArea { get; set; }
+
         public Rectangle TextArea { get; set; }
+
         public Rectangle FullArea { get; set; }
 
         public bool ExpandAreaHot { get; set; }
 
         public Bitmap Icon { get; set; }
+
         public Bitmap ExpandedIcon { get; set; }
 
         public bool Expanded

DarkUI/Extensions/IEnumerableExtensions.cs

@@ -1,7 +1,5 @@
-using System;
+using System.Collections.Generic;
-using System.Collections.Generic;
 using System.Linq;
-using System.Text;
 
 namespace DarkUI
 {
@@ -12,7 +10,7 @@ namespace DarkUI
             var last = items.LastOrDefault();
             if (last == null)
                 return false;
-            return item.Equals(last); // OR Object.ReferenceEquals(last, item)
+            return item.Equals(last);
         }
 
         internal static bool IsFirst<T>(this IEnumerable<T> items, T item)

DarkUI/Win32/DarkControlScrollFilter.cs

@@ -14,9 +14,8 @@ namespace DarkUI
                     var hControlUnderMouse = Native.WindowFromPoint(new Point((int)m.LParam));
 
                     if (hControlUnderMouse == m.HWnd)
-                        return false; // Already headed for the right control.
+                        return false;
 
-                    // Redirect the message to the control under the mouse.
                     Native.SendMessage(hControlUnderMouse, (uint)m.Msg, m.WParam, m.LParam);
                     return true;
             }

Example/Forms/Dialogs/DialogAbout.cs

@@ -11,7 +11,7 @@ namespace Example
         {
             InitializeComponent();
 
-            lblVersion.Text = string.Format("Version: {0}", Application.ProductVersion.ToString());
+            lblVersion.Text = $"Version: {Application.ProductVersion.ToString()}";
             btnOk.Text = "Close";
         }
 

Example/Forms/Dialogs/DialogTest.cs

@@ -11,7 +11,7 @@ namespace Example
             // Build dummy list data
             for (var i = 0; i < 100; i++)
             {
-                var item = new DarkListItem(string.Format("List item #{0}", i));
+                var item = new DarkListItem($"List item #{i}");
                 lstTest.Items.Add(item);
             }
 
@@ -19,13 +19,13 @@ namespace Example
             var childCount = 0;
             for (var i = 0; i < 20; i++)
             {
-                var node = new DarkTreeNode(string.Format("Root node #{0}", i));
+                var node = new DarkTreeNode($"Root node #{i}");
                 node.ExpandedIcon = Icons.folder_open;
                 node.Icon = Icons.folder_closed;
 
                 for (var x = 0; x < 10; x++)
                 {
-                    var childNode = new DarkTreeNode(string.Format("Child node #{0}", childCount));
+                    var childNode = new DarkTreeNode($"Child node #{childCount}");
                     childNode.Icon = Icons.files;
                     childCount++;
                     node.Nodes.Add(childNode);

Example/Forms/Docking/DockConsole.cs

@@ -13,7 +13,7 @@ namespace Example
             // Build dummy list data
             for (var i = 0; i < 100; i++)
             {
-                var item = new DarkListItem(string.Format("List item #{0}", i));
+                var item = new DarkListItem($"List item #{i}");
                 lstConsole.Items.Add(item);
             }
         }

Example/Forms/Docking/DockHistory.cs

@@ -13,7 +13,7 @@ namespace Example
             // Build dummy list data
             for (var i = 0; i < 100; i++)
             {
-                var item = new DarkListItem(string.Format("List item #{0}", i));
+                var item = new DarkListItem($"List item #{i}");
                 lstHistory.Items.Add(item);
             }
         }

Example/Forms/Docking/DockLayers.cs

@@ -13,7 +13,7 @@ namespace Example
             // Build dummy list data
             for (var i = 0; i < 100; i++)
             {
-                var item = new DarkListItem(string.Format("List item #{0}", i));
+                var item = new DarkListItem($"List item #{i}");
                 lstLayers.Items.Add(item);
             }
         }

Example/Forms/Docking/DockProject.cs

@@ -14,13 +14,13 @@ namespace Example
             var childCount = 0;
             for (var i = 0; i < 20; i++)
             {
-                var node = new DarkTreeNode(string.Format("Root node #{0}", i));
+                var node = new DarkTreeNode($"Root node #{i}");
                 node.ExpandedIcon = Icons.folder_open;
                 node.Icon = Icons.folder_closed;
 
                 for (var x = 0; x < 10; x++)
                 {
-                    var childNode = new DarkTreeNode(string.Format("Child node #{0}", childCount));
+                    var childNode = new DarkTreeNode($"Child node #{childCount}");
                     childNode.Icon = Icons.files;
                     childCount++;
                     node.Nodes.Add(childNode);

Example/Forms/MainForm.cs

@@ -43,7 +43,7 @@ namespace Example
             DockPanel.AddContent(_dockLayers);
             DockPanel.AddContent(_dockHistory);
 
-            // Add 3 dummy documents to the main document area of the dock panel
+            // Add dummy documents to the main document area of the dock panel
             DockPanel.AddContent(new DockDocument { DockText = "Document 1" });
             DockPanel.AddContent(new DockDocument { DockText = "Document 2" });
             DockPanel.AddContent(new DockDocument { DockText = "Document 3" });

Example/Program.cs

@@ -5,9 +5,6 @@ namespace Example
 {
     static class Program
     {
-        /// <summary>
-        /// The main entry point for the application.
-        /// </summary>
         [STAThread]
         static void Main()
         {