diff --git a/mcs/class/System.ServiceModel.Web/System.ServiceModel.Web/WebOperationContext.cs b/mcs/class/System.ServiceModel.Web/System.ServiceModel.Web/WebOperationContext.cs
index 587880e9c6c98..9857450eded08 100644
--- a/mcs/class/System.ServiceModel.Web/System.ServiceModel.Web/WebOperationContext.cs
+++ b/mcs/class/System.ServiceModel.Web/System.ServiceModel.Web/WebOperationContext.cs
@@ -111,7 +111,7 @@ public void Detach (OperationContext context)
 			// do nothing
 		}
 
-#if NET_4_0
+#if NET_4_0 && !MOBILE
 		static readonly XmlWriterSettings settings = new XmlWriterSettings () { OmitXmlDeclaration = true, Indent = false };
 		XmlSerializer document_serializer, feed_serializer, item_serializer;
 
diff --git a/mcs/class/System.ServiceModel/System.ServiceModel/BasicHttpBinding.cs b/mcs/class/System.ServiceModel/System.ServiceModel/BasicHttpBinding.cs
index b3607f3d55a8a..a52e1612627b3 100644
--- a/mcs/class/System.ServiceModel/System.ServiceModel/BasicHttpBinding.cs
+++ b/mcs/class/System.ServiceModel/System.ServiceModel/BasicHttpBinding.cs
@@ -29,7 +29,7 @@
 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 //
-#if !NET_4_5
+#if !NET_4_5 || MOBILE
 using System;
 using System.Collections.Generic;
 using System.Net;
diff --git a/mcs/class/System.Web/System.Web.Util/HttpEncoder.cs b/mcs/class/System.Web/System.Web.Util/HttpEncoder.cs
index e2cb34bcc0e81..ddda8757888cd 100644
--- a/mcs/class/System.Web/System.Web.Util/HttpEncoder.cs
+++ b/mcs/class/System.Web/System.Web.Util/HttpEncoder.cs
@@ -35,7 +35,7 @@
 using System.Configuration;
 using System.IO;
 using System.Text;
-#if NET_4_0
+#if NET_4_0 && !MOBILE
 using System.Web.Configuration;
 #endif
 
@@ -188,6 +188,9 @@ protected internal virtual byte[] UrlEncode (byte[] bytes, int offset, int count
 
 		static HttpEncoder GetCustomEncoderFromConfig ()
 		{
+#if MOBILE
+			return defaultEncoder.Value;
+#else
 			var cfg = HttpRuntime.Section;
 			string typeName = cfg.EncoderType;
 
@@ -204,6 +207,7 @@ static HttpEncoder GetCustomEncoderFromConfig ()
 				);
 
 			return Activator.CreateInstance (t, false) as HttpEncoder;
+#endif
 		}
 #endif
 #if NET_4_0
diff --git a/mcs/class/System.Web/System.Web/HttpUtility.cs b/mcs/class/System.Web/System.Web/HttpUtility.cs
index e05ae9761bb67..bb821a573cfc2 100644
--- a/mcs/class/System.Web/System.Web/HttpUtility.cs
+++ b/mcs/class/System.Web/System.Web/HttpUtility.cs
@@ -552,10 +552,12 @@ public static string HtmlEncode (object value)
 			if (value == null)
 				return null;
 
+#if !MOBILE
 			IHtmlString htmlString = value as IHtmlString;
 			if (htmlString != null)
 				return htmlString.ToHtmlString ();
-			
+#endif
+
 			return HtmlEncode (value.ToString ());
 		}
 
diff --git a/mcs/class/corlib/System.Reflection/Assembly.cs b/mcs/class/corlib/System.Reflection/Assembly.cs
index 6c26ab284a576..97e2bc6a984b1 100644
--- a/mcs/class/corlib/System.Reflection/Assembly.cs
+++ b/mcs/class/corlib/System.Reflection/Assembly.cs
@@ -889,7 +889,6 @@ private void LoadAssemblyPermissions ()
 				}
 			}
 		}
-#endif
 		
 #if NET_4_0
 		public virtual PermissionSet PermissionSet {
@@ -901,6 +900,8 @@ private void LoadAssemblyPermissions ()
 		}
 #endif
 
+#endif
+
 #if NET_4_0 || MOONLIGHT || MOBILE
 		static Exception CreateNIE ()
 		{
diff --git a/mcs/class/corlib/System/Console.cs b/mcs/class/corlib/System/Console.cs
index fe0f229e396b1..71963cdc8c3b4 100644
--- a/mcs/class/corlib/System/Console.cs
+++ b/mcs/class/corlib/System/Console.cs
@@ -217,26 +217,6 @@ static void SetupStreams (Encoding inputEncoding, Encoding outputEncoding)
 			}
 		}
 
-#if NET_4_5
-		public static bool IsErrorRedirected {
-			get {
-				return stderr != console_stderr || ConsoleDriver.IsErrorRedirected;
-			}
-		}
-
-		public static bool IsOutputRedirected {
-			get {
-				return stdout != console_stdout || ConsoleDriver.IsOutputRedirected;
-			}
-		}
-
-		public static bool IsInputRedirected {
-			get {
-				return stdin != console_stdin || ConsoleDriver.IsInputRedirected;
-			}
-		}
-#endif
-
 		private static Stream Open (IntPtr handle, FileAccess access, int bufferSize)
 		{
 #if MOONLIGHT
@@ -695,6 +675,26 @@ public static string ReadLine ()
 			set { ConsoleDriver.WindowWidth = value; }
 		}
 
+#if NET_4_5
+		public static bool IsErrorRedirected {
+			get {
+				return stderr != console_stderr || ConsoleDriver.IsErrorRedirected;
+			}
+		}
+
+		public static bool IsOutputRedirected {
+			get {
+				return stdout != console_stdout || ConsoleDriver.IsOutputRedirected;
+			}
+		}
+
+		public static bool IsInputRedirected {
+			get {
+				return stdin != console_stdin || ConsoleDriver.IsInputRedirected;
+			}
+		}
+#endif
+
 		public static void Beep ()
 		{
 			Beep (1000, 500);