diff --git a/Xamarin.Forms.Build.Tasks/CreateObjectVisitor.cs b/Xamarin.Forms.Build.Tasks/CreateObjectVisitor.cs
index e6453575e..449b887fd 100644
--- a/Xamarin.Forms.Build.Tasks/CreateObjectVisitor.cs
+++ b/Xamarin.Forms.Build.Tasks/CreateObjectVisitor.cs
@@ -39,17 +39,6 @@ namespace Xamarin.Forms.Build.Tasks
 		public void Visit(ValueNode node, INode parentNode)
 		{
 			Context.Values[node] = node.Value;
-
-			XmlName propertyName;
-			if (SetPropertiesVisitor.TryGetPropertyName(node, parentNode, out propertyName))
-			{
-				if (propertyName.NamespaceURI == "http://schemas.openxmlformats.org/markup-compatibility/2006" &&
-				    propertyName.LocalName == "Ignorable")
-				{
-					(parentNode.IgnorablePrefixes ?? (parentNode.IgnorablePrefixes = new List<string>())).AddRange(
-						(node.Value as string).Split(','));
-				}
-			}
 		}
 
 		public void Visit(MarkupNode node, INode parentNode)
@@ -59,12 +48,6 @@ namespace Xamarin.Forms.Build.Tasks
 
 		public void Visit(ElementNode node, INode parentNode)
 		{
-			if (node.SkipPrefix((node.NamespaceResolver ?? parentNode.NamespaceResolver).LookupPrefix(node.NamespaceURI))) {
-				node.Properties.Clear();
-				node.CollectionItems.Clear();
-				return;
-			}
-
 			var typeref = node.XmlType.GetTypeReference(Module, node);
 			TypeDefinition typedef = typeref.Resolve();
 
diff --git a/Xamarin.Forms.Build.Tasks/ILRootNode.cs b/Xamarin.Forms.Build.Tasks/ILRootNode.cs
index 1c59cd3cd..77e1e8ca8 100644
--- a/Xamarin.Forms.Build.Tasks/ILRootNode.cs
+++ b/Xamarin.Forms.Build.Tasks/ILRootNode.cs
@@ -1,3 +1,4 @@
+using System.Xml;
 using Mono.Cecil;
 using Xamarin.Forms.Xaml;
 
@@ -5,7 +6,7 @@ namespace Xamarin.Forms.Build.Tasks
 {
 	class ILRootNode : RootNode
 	{
-		public ILRootNode(XmlType xmlType, TypeReference typeReference) : base(xmlType, null)
+		public ILRootNode(XmlType xmlType, TypeReference typeReference, IXmlNamespaceResolver nsResolver) : base(xmlType, nsResolver)
 		{
 			TypeReference = typeReference;
 		}
diff --git a/Xamarin.Forms.Build.Tasks/SetNamescopesAndRegisterNamesVisitor.cs b/Xamarin.Forms.Build.Tasks/SetNamescopesAndRegisterNamesVisitor.cs
index 477328e2a..8e03b925e 100644
--- a/Xamarin.Forms.Build.Tasks/SetNamescopesAndRegisterNamesVisitor.cs
+++ b/Xamarin.Forms.Build.Tasks/SetNamescopesAndRegisterNamesVisitor.cs
@@ -43,9 +43,6 @@ namespace Xamarin.Forms.Build.Tasks
 
 		public void Visit(ElementNode node, INode parentNode)
 		{
-			if (node.SkipPrefix((node.NamespaceResolver ?? parentNode.NamespaceResolver).LookupPrefix(node.NamespaceURI)))
-				return;
-
 			VariableDefinition ns;
 			if (parentNode == null || IsDataTemplate(node, parentNode) || IsStyle(node, parentNode))
 				ns = CreateNamescope();
diff --git a/Xamarin.Forms.Build.Tasks/SetPropertiesVisitor.cs b/Xamarin.Forms.Build.Tasks/SetPropertiesVisitor.cs
index a1c0711a2..b6bdf40b7 100644
--- a/Xamarin.Forms.Build.Tasks/SetPropertiesVisitor.cs
+++ b/Xamarin.Forms.Build.Tasks/SetPropertiesVisitor.cs
@@ -67,15 +67,9 @@ namespace Xamarin.Forms.Build.Tasks
 
 			if (skips.Contains(propertyName))
 				return;
-			if (node.SkipPrefix((node.NamespaceResolver ?? parentNode.NamespaceResolver)?.LookupPrefix(propertyName.NamespaceURI)))
-				return;
 			if (propertyName.NamespaceURI == "http://schemas.openxmlformats.org/markup-compatibility/2006" &&
 			    propertyName.LocalName == "Ignorable")
-			{
-				(parentNode.IgnorablePrefixes ?? (parentNode.IgnorablePrefixes = new List<string>())).AddRange(
-					(node.Value as string).Split(','));
 				return;
-			}
 			SetPropertyValue(Context.Variables[(IElementNode)parentNode], propertyName, node, Context, node);
 		}
 
@@ -85,9 +79,6 @@ namespace Xamarin.Forms.Build.Tasks
 
 		public void Visit(ElementNode node, INode parentNode)
 		{
-			if (node.SkipPrefix((node.NamespaceResolver ?? parentNode.NamespaceResolver)?.LookupPrefix(node.NamespaceURI)))
-				return;
-
 			//if this node is an IMarkupExtension, invoke ProvideValue() and replace the variable
 			var vardef = Context.Variables[node];
 			var vardefref = new VariableDefinitionReference(vardef);
diff --git a/Xamarin.Forms.Build.Tasks/SetResourcesVisitor.cs b/Xamarin.Forms.Build.Tasks/SetResourcesVisitor.cs
index 2bf19c268..25efa439b 100644
--- a/Xamarin.Forms.Build.Tasks/SetResourcesVisitor.cs
+++ b/Xamarin.Forms.Build.Tasks/SetResourcesVisitor.cs
@@ -52,15 +52,9 @@ namespace Xamarin.Forms.Build.Tasks
 					return;
 			}
 
-			if (node.SkipPrefix((node.NamespaceResolver ?? parentNode.NamespaceResolver)?.LookupPrefix(propertyName.NamespaceURI)))
-				return;
 			if (propertyName.NamespaceURI == "http://schemas.openxmlformats.org/markup-compatibility/2006" &&
 				propertyName.LocalName == "Ignorable")
-			{
-				(parentNode.IgnorablePrefixes ?? (parentNode.IgnorablePrefixes = new List<string>())).AddRange(
-					(node.Value as string).Split(','));
 				return;
-			}
 			if (propertyName.LocalName != "MergedWith")
 				return;
 			SetPropertiesVisitor.SetPropertyValue(Context.Variables[(IElementNode)parentNode], propertyName, node, Context, node);
diff --git a/Xamarin.Forms.Build.Tasks/XamlCTask.cs b/Xamarin.Forms.Build.Tasks/XamlCTask.cs
index ae2a66d07..b119b4e99 100644
--- a/Xamarin.Forms.Build.Tasks/XamlCTask.cs
+++ b/Xamarin.Forms.Build.Tasks/XamlCTask.cs
@@ -300,6 +300,7 @@ namespace Xamarin.Forms.Build.Tasks
 
 						rootnode.Accept(new XamlNodeVisitor((node, parent) => node.Parent = parent), null);
 						rootnode.Accept(new ExpandMarkupsVisitor(visitorContext), null);
+						rootnode.Accept(new PruneIgnoredNodesVisitor(), null);
 						rootnode.Accept(new CreateObjectVisitor(visitorContext), null);
 						rootnode.Accept(new SetNamescopesAndRegisterNamesVisitor(visitorContext), null);
 						rootnode.Accept(new SetFieldVisitor(visitorContext), null);
@@ -427,7 +428,7 @@ namespace Xamarin.Forms.Build.Tasks
 					}
 
 					XamlParser.ParseXaml(
-						rootnode = new ILRootNode(new XmlType(reader.NamespaceURI, reader.Name, null), typeReference), reader);
+						rootnode = new ILRootNode(new XmlType(reader.NamespaceURI, reader.Name, null), typeReference, reader as IXmlNamespaceResolver), reader);
 					break;
 				}
 			}
diff --git a/Xamarin.Forms.Xaml.UnitTests/McIgnorable.xaml b/Xamarin.Forms.Xaml.UnitTests/McIgnorable.xaml
index 1a196d7c5..2dfe1aa1b 100644
--- a/Xamarin.Forms.Xaml.UnitTests/McIgnorable.xaml
+++ b/Xamarin.Forms.Xaml.UnitTests/McIgnorable.xaml
@@ -12,6 +12,7 @@
 	</ContentPage.BindingContext>
 	<StackLayout x:Name="stack">
 		<d:FakeControlWithContent>
+			<d:Invalid />
 			<Button />
 		</d:FakeControlWithContent>
 	</StackLayout>
diff --git a/Xamarin.Forms.Xaml/ApplyPropertiesVisitor.cs b/Xamarin.Forms.Xaml/ApplyPropertiesVisitor.cs
index cdcbe00df..1e3323230 100644
--- a/Xamarin.Forms.Xaml/ApplyPropertiesVisitor.cs
+++ b/Xamarin.Forms.Xaml/ApplyPropertiesVisitor.cs
@@ -9,7 +9,7 @@ using Xamarin.Forms.Xaml.Internals;
 
 namespace Xamarin.Forms.Xaml
 {
-	class ApplyPropertiesVisitor : IXamlNodeVisitor
+	internal class ApplyPropertiesVisitor : IXamlNodeVisitor
 	{
 		public static readonly IList<XmlName> Skips = new List<XmlName>
 		{
@@ -58,15 +58,9 @@ namespace Xamarin.Forms.Xaml
 					return;
 				if (parentElement.SkipProperties.Contains(propertyName))
 					return;
-				if (parentElement.SkipPrefix(node.NamespaceResolver.LookupPrefix(propertyName.NamespaceURI)))
-					return;
 				if (propertyName.NamespaceURI == "http://schemas.openxmlformats.org/markup-compatibility/2006" &&
-				    propertyName.LocalName == "Ignorable")
-				{
-					(parentNode.IgnorablePrefixes ?? (parentNode.IgnorablePrefixes = new List<string>())).AddRange(
-						(value as string).Split(','));
+					propertyName.LocalName == "Ignorable")
 					return;
-				}
 				SetPropertyValue(source, propertyName, value, Context.RootElement, node, Context, node);
 			}
 			else if (IsCollectionItem(node, parentNode) && parentNode is IElementNode)
@@ -91,9 +85,6 @@ namespace Xamarin.Forms.Xaml
 
 		public void Visit(ElementNode node, INode parentNode)
 		{
-			if (node.SkipPrefix(node.NamespaceResolver.LookupPrefix(node.NamespaceURI)))
-				return;
-
 			var value = Values[node];
 			var parentElement = parentNode as IElementNode;
 			var markupExtension = value as IMarkupExtension;
diff --git a/Xamarin.Forms.Xaml/CreateValuesVisitor.cs b/Xamarin.Forms.Xaml/CreateValuesVisitor.cs
index 014d82c24..d68480330 100644
--- a/Xamarin.Forms.Xaml/CreateValuesVisitor.cs
+++ b/Xamarin.Forms.Xaml/CreateValuesVisitor.cs
@@ -41,17 +41,6 @@ namespace Xamarin.Forms.Xaml
 		public void Visit(ValueNode node, INode parentNode)
 		{
 			Values[node] = node.Value;
-
-			XmlName propertyName;
-			if (ApplyPropertiesVisitor.TryGetPropertyName(node, parentNode, out propertyName))
-			{
-				if (propertyName.NamespaceURI == "http://schemas.openxmlformats.org/markup-compatibility/2006" &&
-				    propertyName.LocalName == "Ignorable")
-				{
-					(parentNode.IgnorablePrefixes ?? (parentNode.IgnorablePrefixes = new List<string>())).AddRange(
-						(node.Value as string).Split(','));
-				}
-			}
 		}
 
 		public void Visit(MarkupNode node, INode parentNode)
@@ -62,12 +51,6 @@ namespace Xamarin.Forms.Xaml
 		{
 			object value = null;
 
-			if (node.SkipPrefix(node.NamespaceResolver.LookupPrefix(node.NamespaceURI))) {
-				node.Properties.Clear();
-				node.CollectionItems.Clear();
-				return;
-			}
-
 			XamlParseException xpe;
 			var type = XamlParser.GetElementType(node.XmlType, node, Context.RootElement?.GetType().GetTypeInfo().Assembly,
 				out xpe);
diff --git a/Xamarin.Forms.Xaml/FillResourceDictionariesVisitor.cs b/Xamarin.Forms.Xaml/FillResourceDictionariesVisitor.cs
index c140084a2..a3f121095 100644
--- a/Xamarin.Forms.Xaml/FillResourceDictionariesVisitor.cs
+++ b/Xamarin.Forms.Xaml/FillResourceDictionariesVisitor.cs
@@ -48,11 +48,8 @@ namespace Xamarin.Forms.Xaml
 				if (parentElement.SkipPrefix(node.NamespaceResolver.LookupPrefix(propertyName.NamespaceURI)))
 					return;
 				if (propertyName.NamespaceURI == "http://schemas.openxmlformats.org/markup-compatibility/2006" &&
-					propertyName.LocalName == "Ignorable") {
-					(parentNode.IgnorablePrefixes ?? (parentNode.IgnorablePrefixes = new List<string> ())).AddRange (
-						(value as string).Split (','));
+					propertyName.LocalName == "Ignorable") 
 					return;
-				}
 				if (propertyName.LocalName != "MergedWith")
 					return;
 				ApplyPropertiesVisitor.SetPropertyValue(source, propertyName, value, Context.RootElement, node, Context, node);
@@ -66,9 +63,6 @@ namespace Xamarin.Forms.Xaml
 
 		public void Visit(ElementNode node, INode parentNode)
 		{
-			if (node.SkipPrefix(node.NamespaceResolver.LookupPrefix(node.NamespaceURI)))
-				return;
-
 			var value = Values[node];
 			var parentElement = parentNode as IElementNode;
 			var markupExtension = value as IMarkupExtension;
diff --git a/Xamarin.Forms.Xaml/PruneIgnoredNodesVisitor.cs b/Xamarin.Forms.Xaml/PruneIgnoredNodesVisitor.cs
new file mode 100644
index 000000000..95ddb20fd
--- /dev/null
+++ b/Xamarin.Forms.Xaml/PruneIgnoredNodesVisitor.cs
@@ -0,0 +1,85 @@
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Xamarin.Forms.Xaml
+{
+	class PruneIgnoredNodesVisitor : IXamlNodeVisitor
+	{
+		public bool StopOnDataTemplate {
+			get { return false; }
+		}
+
+		public bool StopOnResourceDictionary {
+			get { return false; }
+		}
+
+		public bool VisitChildrenFirst {
+			get { return false; }
+		}
+
+		public void Visit(ElementNode node, INode parentNode)
+		{
+			foreach (var propertyKvp in node.Properties)
+			{
+				var propertyName = propertyKvp.Key;
+				var propertyValue = (propertyKvp.Value as ValueNode)?.Value as string;
+				if (propertyValue == null)
+					continue;
+				if (propertyName.NamespaceURI != "http://schemas.openxmlformats.org/markup-compatibility/2006" ||
+					propertyName.LocalName != "Ignorable")
+					continue;
+				(parentNode.IgnorablePrefixes ?? (parentNode.IgnorablePrefixes = new List<string>())).AddRange(propertyValue.Split(','));
+			}
+
+			foreach (var propertyKvp in node.Properties.ToList())
+			{
+				// skip d:foo="bar"
+				var prefix = node.NamespaceResolver.LookupPrefix(propertyKvp.Key.NamespaceURI);
+				if (node.SkipPrefix(prefix))
+					node.Properties.Remove(propertyKvp.Key);
+				var propNs = (propertyKvp.Value as IElementNode)?.NamespaceURI ?? "";
+				var propPrefix = node.NamespaceResolver.LookupPrefix(propNs);
+				if (node.SkipPrefix(propPrefix))
+					node.Properties.Remove(propertyKvp.Key);
+			}
+
+			foreach (var prop in node.CollectionItems.ToList())
+			{
+				var propNs = (prop as IElementNode)?.NamespaceURI ?? "";
+				var propPrefix = node.NamespaceResolver.LookupPrefix(propNs);
+				if (node.SkipPrefix(propPrefix))
+					node.CollectionItems.Remove(prop);
+			}
+
+			if (node.SkipPrefix(node.NamespaceResolver.LookupPrefix(node.NamespaceURI)))
+			{
+				node.Properties.Clear();
+				node.CollectionItems.Clear();
+			}
+		}
+
+		public void Visit(RootNode node, INode parentNode)
+		{
+			Visit((ElementNode)node, node);
+		}
+
+		public void Visit(MarkupNode node, INode parentNode)
+		{
+		}
+
+		public void Visit(ListNode node, INode parentNode)
+		{
+			foreach (var prop in node.CollectionItems.ToList())
+			{
+				var propNs = (prop as IElementNode)?.NamespaceURI ?? "";
+				var propPrefix = node.NamespaceResolver.LookupPrefix(propNs);
+				if (node.SkipPrefix(propPrefix))
+					node.CollectionItems.Remove(prop);
+			}
+		}
+
+		public void Visit(ValueNode node, INode parentNode)
+		{
+		}
+	}
+}
\ No newline at end of file
diff --git a/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml.csproj b/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml.csproj
index cb4577c9a..f521d3627 100644
--- a/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml.csproj
+++ b/Xamarin.Forms.Xaml/Xamarin.Forms.Xaml.csproj
@@ -81,6 +81,7 @@
     <Compile Include="ExpandMarkupsVisitor.cs" />
     <Compile Include="XamlCompilationAttribute.cs" />
     <Compile Include="TypeArgumentsParser.cs" />
+    <Compile Include="PruneIgnoredNodesVisitor.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath32)\Microsoft\Portable\$(TargetFrameworkVersion)\Microsoft.Portable.CSharp.targets" />
   <ItemGroup>
diff --git a/Xamarin.Forms.Xaml/XamlLoader.cs b/Xamarin.Forms.Xaml/XamlLoader.cs
index 404140922..dcab4e94f 100644
--- a/Xamarin.Forms.Xaml/XamlLoader.cs
+++ b/Xamarin.Forms.Xaml/XamlLoader.cs
@@ -117,6 +117,7 @@ namespace Xamarin.Forms.Xaml
 		{
 			rootnode.Accept (new XamlNodeVisitor ((node, parent) => node.Parent = parent), null); //set parents for {StaticResource}
 			rootnode.Accept (new ExpandMarkupsVisitor (visitorContext), null);
+			rootnode.Accept (new PruneIgnoredNodesVisitor(), null);
 			rootnode.Accept (new NamescopingVisitor (visitorContext), null); //set namescopes for {x:Reference}
 			rootnode.Accept (new CreateValuesVisitor (visitorContext), null);
 			rootnode.Accept (new RegisterXNamesVisitor (visitorContext), null);