Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/WebControls/TreeNodeStyleCollection.cs

@@ -0,0 +1,82 @@
+//------------------------------------------------------------------------------
+// <copyright file="TreeNodeStyleCollection.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI.WebControls {
+    using System;
+    using System.Collections;
+    using System.ComponentModel;
+    using System.Web;
+
+    public sealed class TreeNodeStyleCollection : StateManagedCollection {
+        private static readonly Type[] knownTypes = new Type[] { typeof(TreeNodeStyle) };
+
+        internal TreeNodeStyleCollection() {
+        }
+
+        protected override void OnInsert(int index, object value) {
+            base.OnInsert(index, value);
+            if (value is TreeNodeStyle) {
+                TreeNodeStyle style = (TreeNodeStyle)value;
+                style.Font.Underline = style.Font.Underline;
+            }
+            else {
+                throw new ArgumentException(SR.GetString(SR.TreeNodeStyleCollection_InvalidArgument), "value");
+            }
+        }
+
+        public TreeNodeStyle this[int i] {
+            get {
+                return (TreeNodeStyle)((IList)this)[i];
+            }
+            set {
+                ((IList)this)[i] = value;
+            }
+        }
+
+        public int Add(TreeNodeStyle style) {
+            return ((IList)this).Add(style);
+        }
+
+        public bool Contains(TreeNodeStyle style) {
+            return ((IList)this).Contains(style);
+        }
+
+        public void CopyTo(TreeNodeStyle[] styleArray, int index) {
+            base.CopyTo(styleArray, index);
+        }
+
+        public int IndexOf(TreeNodeStyle style) {
+            return ((IList)this).IndexOf(style);
+        }
+
+        public void Insert(int index, TreeNodeStyle style) {
+            ((IList)this).Insert(index, style);
+        }
+
+        protected override object CreateKnownType(int index) {
+            return new TreeNodeStyle();
+        }
+
+        protected override Type[] GetKnownTypes() {
+            return knownTypes;
+        }
+
+        public void Remove(TreeNodeStyle style) {
+            ((IList)this).Remove(style);
+        }
+
+        public void RemoveAt(int index) {
+            ((IList)this).RemoveAt(index);
+        }
+
+        protected override void SetDirtyObject(object o) {
+            if (o is TreeNodeStyle) {
+                ((TreeNodeStyle)o).SetDirty();
+            }
+        }
+    }
+}
+