diff --git a/BuildToolsVersion.txt b/BuildToolsVersion.txt
index dbc854e0a979..4edf3134b604 100644
--- a/BuildToolsVersion.txt
+++ b/BuildToolsVersion.txt
@@ -1 +1 @@
-2.1.0-preview2-02520-02
+2.1.0-preview2-02521-03
diff --git a/dependencies.props b/dependencies.props
index a8631b40242a..7d170dab5a45 100644
--- a/dependencies.props
+++ b/dependencies.props
@@ -9,15 +9,15 @@
        These ref versions are pulled from https://github.com/dotnet/versions.
   -->
   <PropertyGroup>
-    <CoreFxCurrentRef>7657a6f8cd7c1faa71504e68a154bca8c0c4b3c3</CoreFxCurrentRef>
-    <CoreClrCurrentRef>1466d76b2625385c3fcd75cefcbf8a463cfc843f</CoreClrCurrentRef>
-    <CoreSetupCurrentRef>f83d1fc5f0801921c41a82553655aecc09205a11</CoreSetupCurrentRef>
+    <CoreFxCurrentRef>ab0800eadec8e6771758729ee01a1766b6ecab64</CoreFxCurrentRef>
+    <CoreClrCurrentRef>ab0800eadec8e6771758729ee01a1766b6ecab64</CoreClrCurrentRef>
+    <CoreSetupCurrentRef>ab0800eadec8e6771758729ee01a1766b6ecab64</CoreSetupCurrentRef>
     <ExternalCurrentRef>96dc7805f5df4a70a55783964ce69dcd91bfca80</ExternalCurrentRef>
-    <ProjectNTfsCurrentRef>f83d1fc5f0801921c41a82553655aecc09205a11</ProjectNTfsCurrentRef>
-    <ProjectNTfsTestILCCurrentRef>f83d1fc5f0801921c41a82553655aecc09205a11</ProjectNTfsTestILCCurrentRef>
+    <ProjectNTfsCurrentRef>ab0800eadec8e6771758729ee01a1766b6ecab64</ProjectNTfsCurrentRef>
+    <ProjectNTfsTestILCCurrentRef>ab0800eadec8e6771758729ee01a1766b6ecab64</ProjectNTfsTestILCCurrentRef>
     <SniCurrentRef>8bd1ec5fac9f0eec34ff6b34b1d878b4359e02dd</SniCurrentRef>
     <StandardCurrentRef>6298244e25cf84d91e3cda9627315f2425274624</StandardCurrentRef>
-    <BuildToolsCurrentRef>fc25b8637908d627bae0c0d64bbcba8649f76feb</BuildToolsCurrentRef>
+    <BuildToolsCurrentRef>ab0800eadec8e6771758729ee01a1766b6ecab64</BuildToolsCurrentRef>
   </PropertyGroup>
 
   <!-- Product dependency versions. -->
@@ -31,16 +31,16 @@
 
   <!-- Tests/infrastructure dependency versions. -->
   <PropertyGroup>
-    <CoreFxExpectedPrerelease>preview2-26216-03</CoreFxExpectedPrerelease>
-    <MicrosoftNETCorePlatformsPackageVersion>2.1.0-preview2-26216-03</MicrosoftNETCorePlatformsPackageVersion>
-    <MicrosoftNETCoreRuntimeCoreCLRPackageVersion>2.1.0-preview2-26214-07</MicrosoftNETCoreRuntimeCoreCLRPackageVersion>
-    <ProjectNTfsExpectedPrerelease>beta-26216-00</ProjectNTfsExpectedPrerelease>
-    <ProjectNTfsTestILCExpectedPrerelease>beta-26216-00</ProjectNTfsTestILCExpectedPrerelease>
-    <ProjectNTfsTestILCPackageVersion>1.0.0-beta-26216-00</ProjectNTfsTestILCPackageVersion>
-    <MicrosoftNETCoreDotNetHostPackageVersion>2.1.0-preview2-26216-01</MicrosoftNETCoreDotNetHostPackageVersion>
-    <MicrosoftNETCoreDotNetHostPolicyPackageVersion>2.1.0-preview2-26216-01</MicrosoftNETCoreDotNetHostPolicyPackageVersion>
-    <MicrosoftNETCoreAppPackageVersion>2.1.0-preview2-26216-01</MicrosoftNETCoreAppPackageVersion>
-    <MicrosoftDotNetPlatformAbstractionsPackageVersion>2.1.0-preview2-26216-01</MicrosoftDotNetPlatformAbstractionsPackageVersion>
+    <CoreFxExpectedPrerelease>preview2-26221-05</CoreFxExpectedPrerelease>
+    <MicrosoftNETCorePlatformsPackageVersion>2.1.0-preview2-26221-05</MicrosoftNETCorePlatformsPackageVersion>
+    <MicrosoftNETCoreRuntimeCoreCLRPackageVersion>2.1.0-preview2-26221-06</MicrosoftNETCoreRuntimeCoreCLRPackageVersion>
+    <ProjectNTfsExpectedPrerelease>beta-26221-00</ProjectNTfsExpectedPrerelease>
+    <ProjectNTfsTestILCExpectedPrerelease>beta-26221-00</ProjectNTfsTestILCExpectedPrerelease>
+    <ProjectNTfsTestILCPackageVersion>1.0.0-beta-26221-00</ProjectNTfsTestILCPackageVersion>
+    <MicrosoftNETCoreDotNetHostPackageVersion>2.1.0-preview2-26220-02</MicrosoftNETCoreDotNetHostPackageVersion>
+    <MicrosoftNETCoreDotNetHostPolicyPackageVersion>2.1.0-preview2-26220-02</MicrosoftNETCoreDotNetHostPolicyPackageVersion>
+    <MicrosoftNETCoreAppPackageVersion>2.1.0-preview2-26220-02</MicrosoftNETCoreAppPackageVersion>
+    <MicrosoftDotNetPlatformAbstractionsPackageVersion>2.1.0-preview2-26220-02</MicrosoftDotNetPlatformAbstractionsPackageVersion>
 
     <!-- CoreFX-built SNI identity package -->
     <RuntimeNativeSystemDataSqlClientSniPackageVersion>4.4.0</RuntimeNativeSystemDataSqlClientSniPackageVersion>
@@ -48,13 +48,13 @@
     <AppXRunnerVersion>1.0.3-prerelease-00921-01</AppXRunnerVersion>
     <XunitPerfAnalysisPackageVersion>1.0.0-beta-build0015</XunitPerfAnalysisPackageVersion>
     <TraceEventPackageVersion>1.0.3-alpha-experimental</TraceEventPackageVersion>
-    <XunitNetcoreExtensionsVersion>2.1.0-preview2-02516-02</XunitNetcoreExtensionsVersion>
+    <XunitNetcoreExtensionsVersion>2.1.0-preview2-02521-03</XunitNetcoreExtensionsVersion>
   </PropertyGroup>
 
   <!-- Package versions used as toolsets -->
   <PropertyGroup>
     <FeedTasksPackage>Microsoft.DotNet.Build.Tasks.Feed</FeedTasksPackage>
-    <FeedTasksPackageVersion>2.1.0-preview2-02516-02</FeedTasksPackageVersion>
+    <FeedTasksPackageVersion>2.1.0-preview2-02521-03</FeedTasksPackageVersion>
   </PropertyGroup>
 
   <!-- Package dependency verification/auto-upgrade configuration. -->
diff --git a/external/test-runtime/optional.json b/external/test-runtime/optional.json
index 1a0fcd9414dc..f03ca16c1eee 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-26216-00",
-        "TestILC.armret": "1.0.0-beta-26216-00",
-        "TestILC.x86ret": "1.0.0-beta-26216-00"
+        "TestILC.amd64ret": "1.0.0-beta-26221-00",
+        "TestILC.armret": "1.0.0-beta-26221-00",
+        "TestILC.x86ret": "1.0.0-beta-26221-00"
       }
     }
   }
diff --git a/src/System.Runtime.Serialization.Formatters/tests/BinaryFormatterTestData.cs b/src/System.Runtime.Serialization.Formatters/tests/BinaryFormatterTestData.cs
index 9d15e2597a82..a9537d109085 100644
--- a/src/System.Runtime.Serialization.Formatters/tests/BinaryFormatterTestData.cs
+++ b/src/System.Runtime.Serialization.Formatters/tests/BinaryFormatterTestData.cs
@@ -1089,7 +1089,7 @@ private static IEnumerable<object[]> SerializableObjects()
             yield return new object[] { new Hashtable(EqualityComparer<object>.Default), new string[] { "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", "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" } };
             yield return new object[] { new Hashtable(5), new string[] { "AAEAAAD/////AQAAAAAAAAAEAQAAABxTeXN0ZW0uQ29sbGVjdGlvbnMuSGFzaHRhYmxlBwAAAApMb2FkRmFjdG9yB1ZlcnNpb24IQ29tcGFyZXIQSGFzaENvZGVQcm92aWRlcghIYXNoU2l6ZQRLZXlzBlZhbHVlcwAAAwMABQULCBxTeXN0ZW0uQ29sbGVjdGlvbnMuSUNvbXBhcmVyJFN5c3RlbS5Db2xsZWN0aW9ucy5JSGFzaENvZGVQcm92aWRlcgjsUTg/AAAAAAoKBwAAAAkCAAAACQMAAAAQAgAAAAAAAAAQAwAAAAAAAAAL", "AAEAAAD/////AQAAAAAAAAAEAQAAABxTeXN0ZW0uQ29sbGVjdGlvbnMuSGFzaHRhYmxlBwAAAApMb2FkRmFjdG9yB1ZlcnNpb24IQ29tcGFyZXIQSGFzaENvZGVQcm92aWRlcghIYXNoU2l6ZQRLZXlzBlZhbHVlcwAAAwMABQULCBxTeXN0ZW0uQ29sbGVjdGlvbnMuSUNvbXBhcmVyJFN5c3RlbS5Db2xsZWN0aW9ucy5JSGFzaENvZGVQcm92aWRlcgjsUTg/AAAAAAoKBwAAAAkCAAAACQMAAAAQAgAAAAAAAAAQAwAAAAAAAAAL" } };
             yield return new object[] { new Hashtable(new Dictionary<int, string>(), 0.77f), new string[] { "AAEAAAD/////AQAAAAAAAAAEAQAAABxTeXN0ZW0uQ29sbGVjdGlvbnMuSGFzaHRhYmxlBwAAAApMb2FkRmFjdG9yB1ZlcnNpb24IQ29tcGFyZXIQSGFzaENvZGVQcm92aWRlcghIYXNoU2l6ZQRLZXlzBlZhbHVlcwAAAwMABQULCBxTeXN0ZW0uQ29sbGVjdGlvbnMuSUNvbXBhcmVyJFN5c3RlbS5Db2xsZWN0aW9ucy5JSGFzaENvZGVQcm92aWRlcggp7Q0/AAAAAAoKAwAAAAkCAAAACQMAAAAQAgAAAAAAAAAQAwAAAAAAAAAL", "AAEAAAD/////AQAAAAAAAAAEAQAAABxTeXN0ZW0uQ29sbGVjdGlvbnMuSGFzaHRhYmxlBwAAAApMb2FkRmFjdG9yB1ZlcnNpb24IQ29tcGFyZXIQSGFzaENvZGVQcm92aWRlcghIYXNoU2l6ZQRLZXlzBlZhbHVlcwAAAwMABQULCBxTeXN0ZW0uQ29sbGVjdGlvbnMuSUNvbXBhcmVyJFN5c3RlbS5Db2xsZWN0aW9ucy5JSGFzaENvZGVQcm92aWRlcggp7Q0/AAAAAAoKAwAAAAkCAAAACQMAAAAQAgAAAAAAAAAQAwAAAAAAAAAL" } };
-            yield return new object[] { new Hashtable(StringComparer.InvariantCultureIgnoreCase), new string[] { "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", PlatformDetection.IsNetfx471OrNewer ? "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" : "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" } };
+            yield return new object[] { new Hashtable(StringComparer.InvariantCultureIgnoreCase), new string[] { "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", PlatformDetection.IsNetfx471OrNewer ? "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" : "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" } };
 #pragma warning disable 0618 // obsolete warning
             yield return new object[] { new Hashtable(15, 0.8f, new HashCodeProvider(), Comparer.DefaultInvariant), new string[] { "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", "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" } };
 #pragma warning restore 0618
@@ -1271,7 +1271,7 @@ private static IEnumerable<object[]> SerializableObjects()
                 { "key1", "value1" },
                 { "keyx", "valuex" }
             };
-            yield return new object[] { listDictionary, new string[] { "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", PlatformDetection.IsNetfx471OrNewer ? "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" : "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" } };
+            yield return new object[] { listDictionary, new string[] { "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", PlatformDetection.IsNetfx471OrNewer ? "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" : "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" } };
             yield return new object[] { new System.Collections.Specialized.ListDictionary(StringComparer.Ordinal), new string[] { "AAEAAAD/////AQAAAAAAAAAMAgAAAElTeXN0ZW0sIFZlcnNpb249NC4wLjAuMCwgQ3VsdHVyZT1uZXV0cmFsLCBQdWJsaWNLZXlUb2tlbj1iNzdhNWM1NjE5MzRlMDg5BQEAAAAtU3lzdGVtLkNvbGxlY3Rpb25zLlNwZWNpYWxpemVkLkxpc3REaWN0aW9uYXJ5BAAAAARoZWFkB3ZlcnNpb24FY291bnQIY29tcGFyZXIEAAADPFN5c3RlbS5Db2xsZWN0aW9ucy5TcGVjaWFsaXplZC5MaXN0RGljdGlvbmFyeStEaWN0aW9uYXJ5Tm9kZQIAAAAICBZTeXN0ZW0uT3JkaW5hbENvbXBhcmVyAgAAAAoAAAAAAAAAAAkDAAAABAMAAAAWU3lzdGVtLk9yZGluYWxDb21wYXJlcgEAAAALX2lnbm9yZUNhc2UAAQAL", "AAEAAAD/////AQAAAAAAAAAMAgAAAElTeXN0ZW0sIFZlcnNpb249NC4wLjAuMCwgQ3VsdHVyZT1uZXV0cmFsLCBQdWJsaWNLZXlUb2tlbj1iNzdhNWM1NjE5MzRlMDg5BQEAAAAtU3lzdGVtLkNvbGxlY3Rpb25zLlNwZWNpYWxpemVkLkxpc3REaWN0aW9uYXJ5BAAAAARoZWFkB3ZlcnNpb24FY291bnQIY29tcGFyZXIEAAADPFN5c3RlbS5Db2xsZWN0aW9ucy5TcGVjaWFsaXplZC5MaXN0RGljdGlvbmFyeStEaWN0aW9uYXJ5Tm9kZQIAAAAICBZTeXN0ZW0uT3JkaW5hbENvbXBhcmVyAgAAAAoAAAAAAAAAAAkDAAAABAMAAAAWU3lzdGVtLk9yZGluYWxDb21wYXJlcgEAAAALX2lnbm9yZUNhc2UAAQAL" } };
             yield return new object[] { new System.Collections.Specialized.ListDictionary(StringComparer.OrdinalIgnoreCase), new string[] { "AAEAAAD/////AQAAAAAAAAAMAgAAAElTeXN0ZW0sIFZlcnNpb249NC4wLjAuMCwgQ3VsdHVyZT1uZXV0cmFsLCBQdWJsaWNLZXlUb2tlbj1iNzdhNWM1NjE5MzRlMDg5BQEAAAAtU3lzdGVtLkNvbGxlY3Rpb25zLlNwZWNpYWxpemVkLkxpc3REaWN0aW9uYXJ5BAAAAARoZWFkB3ZlcnNpb24FY291bnQIY29tcGFyZXIEAAADPFN5c3RlbS5Db2xsZWN0aW9ucy5TcGVjaWFsaXplZC5MaXN0RGljdGlvbmFyeStEaWN0aW9uYXJ5Tm9kZQIAAAAICBZTeXN0ZW0uT3JkaW5hbENvbXBhcmVyAgAAAAoAAAAAAAAAAAkDAAAABAMAAAAWU3lzdGVtLk9yZGluYWxDb21wYXJlcgEAAAALX2lnbm9yZUNhc2UAAQEL", "AAEAAAD/////AQAAAAAAAAAMAgAAAElTeXN0ZW0sIFZlcnNpb249NC4wLjAuMCwgQ3VsdHVyZT1uZXV0cmFsLCBQdWJsaWNLZXlUb2tlbj1iNzdhNWM1NjE5MzRlMDg5BQEAAAAtU3lzdGVtLkNvbGxlY3Rpb25zLlNwZWNpYWxpemVkLkxpc3REaWN0aW9uYXJ5BAAAAARoZWFkB3ZlcnNpb24FY291bnQIY29tcGFyZXIEAAADPFN5c3RlbS5Db2xsZWN0aW9ucy5TcGVjaWFsaXplZC5MaXN0RGljdGlvbmFyeStEaWN0aW9uYXJ5Tm9kZQIAAAAICBZTeXN0ZW0uT3JkaW5hbENvbXBhcmVyAgAAAAoAAAAAAAAAAAkDAAAABAMAAAAWU3lzdGVtLk9yZGluYWxDb21wYXJlcgEAAAALX2lnbm9yZUNhc2UAAQEL" } };
 
diff --git a/tools-local/ILAsmVersion.txt b/tools-local/ILAsmVersion.txt
index a41ce36139c8..9017d46944e0 100644
--- a/tools-local/ILAsmVersion.txt
+++ b/tools-local/ILAsmVersion.txt
@@ -1 +1 @@
-2.1.0-preview2-26214-07
\ No newline at end of file
+2.1.0-preview2-26221-06
\ No newline at end of file