Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

docs/HtmlAgilityPack/IOLibrary.cs

@@ -0,0 +1,28 @@
+// HtmlAgilityPack V1.0 - Simon Mourier <simon underscore mourier at hotmail dot com>
+using System.IO;
+
+namespace HtmlAgilityPack
+{
+    internal struct IOLibrary
+    {
+        #region Internal Methods
+
+        internal static void CopyAlways(string source, string target)
+        {
+            if (!File.Exists(source))
+                return;
+            Directory.CreateDirectory(Path.GetDirectoryName(target));
+            MakeWritable(target);
+            File.Copy(source, target, true);
+        }
+
+        internal static void MakeWritable(string path)
+        {
+            if (!File.Exists(path))
+                return;
+            File.SetAttributes(path, File.GetAttributes(path) & ~FileAttributes.ReadOnly);
+        }
+
+        #endregion
+    }
+}