Fixed help files.

Core/LocalProvidersTools.cs

@@ -0,0 +1,48 @@
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Web;
+using System.Web.Configuration;
+
+namespace ScrewTurn.Wiki {
+
+	/// <summary>
+	/// Implements tools for local providers.
+	/// </summary>
+	public static class LocalProvidersTools {
+
+		/// <summary>
+		/// Checks a directory for write permissions.
+		/// </summary>
+		/// <param name="dir">The directory.</param>
+		/// <returns><c>true</c> if the directory has write permissions, <c>false</c> otherwise.</returns>
+		public static bool CheckWritePermissions(string dir) {
+			string file = System.IO.Path.Combine(dir, "__StwTestFile.txt");
+
+			bool canWrite = true;
+
+			System.IO.FileStream fs = null;
+			try {
+				fs = System.IO.File.Create(file);
+				fs.Write(Encoding.ASCII.GetBytes("Hello"), 0, 5);
+			}
+			catch {
+				canWrite = false;
+			}
+			finally {
+				try {
+					if(fs != null) fs.Close();
+					System.IO.File.Delete(file);
+				}
+				catch {
+					canWrite = false;
+				}
+			}
+
+			return canWrite;
+		}
+
+	}
+
+}