diff --git a/dependencies.props b/dependencies.props
index c2ff4bdc97e7..a091b6c8cde2 100644
--- a/dependencies.props
+++ b/dependencies.props
@@ -9,12 +9,12 @@
        These ref versions are pulled from https://github.com/dotnet/versions.
   -->
   <PropertyGroup>
-    <CoreFxCurrentRef>13ca435e8c2b6c8eed73589533a175c283b71f77</CoreFxCurrentRef>
-    <CoreClrCurrentRef>13ca435e8c2b6c8eed73589533a175c283b71f77</CoreClrCurrentRef>
-    <CoreSetupCurrentRef>13ca435e8c2b6c8eed73589533a175c283b71f77</CoreSetupCurrentRef>
+    <CoreFxCurrentRef>7aa763c8edff328ec7771d79a7435a865ae23322</CoreFxCurrentRef>
+    <CoreClrCurrentRef>7aa763c8edff328ec7771d79a7435a865ae23322</CoreClrCurrentRef>
+    <CoreSetupCurrentRef>7aa763c8edff328ec7771d79a7435a865ae23322</CoreSetupCurrentRef>
     <ExternalCurrentRef>96dc7805f5df4a70a55783964ce69dcd91bfca80</ExternalCurrentRef>
-    <ProjectNTfsCurrentRef>13ca435e8c2b6c8eed73589533a175c283b71f77</ProjectNTfsCurrentRef>
-    <ProjectNTfsTestILCCurrentRef>13ca435e8c2b6c8eed73589533a175c283b71f77</ProjectNTfsTestILCCurrentRef>
+    <ProjectNTfsCurrentRef>7aa763c8edff328ec7771d79a7435a865ae23322</ProjectNTfsCurrentRef>
+    <ProjectNTfsTestILCCurrentRef>7aa763c8edff328ec7771d79a7435a865ae23322</ProjectNTfsTestILCCurrentRef>
     <SniCurrentRef>8bd1ec5fac9f0eec34ff6b34b1d878b4359e02dd</SniCurrentRef>
     <StandardCurrentRef>9004703a1923e5c5582ceb8d79712df777412446</StandardCurrentRef>
     <BuildToolsCurrentRef>13ca435e8c2b6c8eed73589533a175c283b71f77</BuildToolsCurrentRef>
@@ -31,15 +31,15 @@
 
   <!-- Tests/infrastructure dependency versions. -->
   <PropertyGroup>
-    <CoreFxExpectedPrerelease>preview1-26628-01</CoreFxExpectedPrerelease>
-    <MicrosoftNETCorePlatformsPackageVersion>3.0.0-preview1-26628-01</MicrosoftNETCorePlatformsPackageVersion>
-    <MicrosoftNETCoreRuntimeCoreCLRPackageVersion>3.0.0-preview1-26628-01</MicrosoftNETCoreRuntimeCoreCLRPackageVersion>
-    <ProjectNTfsExpectedPrerelease>beta-26627-00</ProjectNTfsExpectedPrerelease>
-    <ProjectNTfsTestILCExpectedPrerelease>beta-26627-00</ProjectNTfsTestILCExpectedPrerelease>
-    <ProjectNTfsTestILCPackageVersion>1.0.0-beta-26627-00</ProjectNTfsTestILCPackageVersion>
-    <MicrosoftNETCoreDotNetHostPackageVersion>3.0.0-preview1-26627-03</MicrosoftNETCoreDotNetHostPackageVersion>
-    <MicrosoftNETCoreDotNetHostPolicyPackageVersion>3.0.0-preview1-26627-03</MicrosoftNETCoreDotNetHostPolicyPackageVersion>
-    <MicrosoftNETCoreAppPackageVersion>3.0.0-preview1-26627-03</MicrosoftNETCoreAppPackageVersion>
+    <CoreFxExpectedPrerelease>preview1-26628-03</CoreFxExpectedPrerelease>
+    <MicrosoftNETCorePlatformsPackageVersion>3.0.0-preview1-26628-03</MicrosoftNETCorePlatformsPackageVersion>
+    <MicrosoftNETCoreRuntimeCoreCLRPackageVersion>3.0.0-preview1-26628-04</MicrosoftNETCoreRuntimeCoreCLRPackageVersion>
+    <ProjectNTfsExpectedPrerelease>beta-26628-00</ProjectNTfsExpectedPrerelease>
+    <ProjectNTfsTestILCExpectedPrerelease>beta-26628-00</ProjectNTfsTestILCExpectedPrerelease>
+    <ProjectNTfsTestILCPackageVersion>1.0.0-beta-26628-00</ProjectNTfsTestILCPackageVersion>
+    <MicrosoftNETCoreDotNetHostPackageVersion>3.0.0-preview1-26628-01</MicrosoftNETCoreDotNetHostPackageVersion>
+    <MicrosoftNETCoreDotNetHostPolicyPackageVersion>3.0.0-preview1-26628-01</MicrosoftNETCoreDotNetHostPolicyPackageVersion>
+    <MicrosoftNETCoreAppPackageVersion>3.0.0-preview1-26628-01</MicrosoftNETCoreAppPackageVersion>
 
     <!-- CoreFX-built SNI identity package -->
     <RuntimeNativeSystemDataSqlClientSniPackageVersion>4.4.0</RuntimeNativeSystemDataSqlClientSniPackageVersion>
diff --git a/external/test-runtime/optional.json b/external/test-runtime/optional.json
index b213a1067c39..a14919e2feda 100644
--- a/external/test-runtime/optional.json
+++ b/external/test-runtime/optional.json
@@ -3,9 +3,9 @@
     "net45": {
       "dependencies": {
         "Microsoft.DotNet.IBCMerge": "4.6.0-alpha-00001",
-        "TestILC.amd64ret": "1.0.0-beta-26627-00",
-        "TestILC.armret": "1.0.0-beta-26627-00",
-        "TestILC.x86ret": "1.0.0-beta-26627-00"
+        "TestILC.amd64ret": "1.0.0-beta-26628-00",
+        "TestILC.armret": "1.0.0-beta-26628-00",
+        "TestILC.x86ret": "1.0.0-beta-26628-00"
       }
     }
   }
diff --git a/src/System.Runtime.WindowsRuntime/src/System/Runtime/InteropServices/WindowsRuntime/MarshalingHelpers.cs b/src/System.Runtime.WindowsRuntime/src/System/Runtime/InteropServices/WindowsRuntime/MarshalingHelpers.cs
index 57d3124eae9a..6c6c1d8f6d42 100644
--- a/src/System.Runtime.WindowsRuntime/src/System/Runtime/InteropServices/WindowsRuntime/MarshalingHelpers.cs
+++ b/src/System.Runtime.WindowsRuntime/src/System/Runtime/InteropServices/WindowsRuntime/MarshalingHelpers.cs
@@ -310,8 +310,8 @@ internal void remove_CollectionChanged(EventRegistrationToken token)
             INotifyCollectionChanged _this = Unsafe.As<INotifyCollectionChanged>(this);
             EventRegistrationTokenTable<NotifyCollectionChangedEventHandler> table = s_weakTable.GetOrCreateValue(_this);
 
-            NotifyCollectionChangedEventHandler handler = table.ExtractHandler(token);
-            if (handler != null)
+            NotifyCollectionChangedEventHandler handler;
+            if (table.RemoveEventHandler(token, out handler))
             {
                 _this.CollectionChanged -= handler;
             }
@@ -392,8 +392,8 @@ internal void remove_PropertyChanged(EventRegistrationToken token)
             INotifyPropertyChanged _this = Unsafe.As<INotifyPropertyChanged>(this);
             EventRegistrationTokenTable<PropertyChangedEventHandler> table = s_weakTable.GetOrCreateValue(_this);
 
-            PropertyChangedEventHandler handler = table.ExtractHandler(token);
-            if (handler != null)
+            PropertyChangedEventHandler handler;
+            if (table.RemoveEventHandler(token, out handler))
             {
                 _this.PropertyChanged -= handler;
             }
@@ -500,8 +500,8 @@ private void remove_CanExecuteChanged(EventRegistrationToken token)
             ICommand _this = Unsafe.As<ICommand>(this);
             EventRegistrationTokenTable<EventHandler> table = s_weakTable.GetOrCreateValue(_this);
 
-            EventHandler handler = table.ExtractHandler(token);
-            if (handler != null)
+            EventHandler handler;
+            if (table.RemoveEventHandler(token, out handler))
             {
                 _this.CanExecuteChanged -= handler;
             }
diff --git a/tools-local/ILAsmVersion.txt b/tools-local/ILAsmVersion.txt
index 453a2b67962c..e23f0a23e49d 100644
--- a/tools-local/ILAsmVersion.txt
+++ b/tools-local/ILAsmVersion.txt
@@ -1 +1 @@
-3.0.0-preview1-26628-01
\ No newline at end of file
+3.0.0-preview1-26628-04
\ No newline at end of file