diff --git a/eng/Build.ps1 b/eng/Build.ps1
index 40c32755968..cc93c1e68fc 100644
--- a/eng/Build.ps1
+++ b/eng/Build.ps1
@@ -48,6 +48,7 @@ param (
     [switch]$useGlobalNuGetCache = $true,
     [switch]$dontUseGlobalNuGetCache = $false,
     [switch]$warnAsError = $true,
+    [string]$warnNotAsError = "",
     [switch][Alias('test')]$testDesktop,
     [string]$testDesktopBatch = "",
     [switch]$testCoreClr,
@@ -149,6 +150,7 @@ function Print-Usage() {
     Write-Host "  -compressAllMetadata          Build product with compressed metadata"
     Write-Host "  -buildnorealsig               Build product with realsig- (default use realsig+, where necessary)"
     Write-Host "  -verifypackageshipstatus      Verify whether the packages we are building have already shipped to nuget"
+    Write-Host "  -warnNotAsError <codes>       Suppress specific warnings from being treated as errors (semi-colon delimited)"
     Write-Host ""
     Write-Host "Command line arguments starting with '/p:' are passed through to MSBuild."
 }
@@ -305,6 +307,8 @@ function BuildSolution([string] $solutionName, $packSolution) {
 
     $pack = if ($packSolution -eq $False) {""} else {$pack}
 
+    $msbuildWarnNotAsError = if ($warnAsError -and $warnNotAsError -ne "") { "/warnNotAsError:$warnNotAsError" } else { "" }
+
     MSBuild $toolsetBuildProj `
         $bl `
         /p:Configuration=$configuration `
@@ -327,7 +331,8 @@ function BuildSolution([string] $solutionName, $packSolution) {
         /p:BuildNoRealsig=$buildnorealsig `
         /v:$verbosity `
         $suppressExtensionDeployment `
-        @properties
+        @properties `
+        $msbuildWarnNotAsError
 
     $env:BUILDING_USING_DOTNET=$BUILDING_USING_DOTNET_ORIG
 }
diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index 3453cbc4a62..422144a0a65 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Dependencies>
-  <Source Uri="https://github.com/dotnet/dotnet" Mapping="fsharp" Sha="1a405c76db678301b6f6f5b22d2a63a152c26b97" BarId="309188" />
+  <Source Uri="https://github.com/dotnet/dotnet" Mapping="fsharp" Sha="0cf6b19ed68d2d52e097e6af6d6046b4eeefefe2" BarId="309569" />
   <ProductDependencies>
     <Dependency Name="Microsoft.Build" Version="18.6.0-preview-26180-08">
       <Uri>https://github.com/dotnet/msbuild</Uri>
diff --git a/eng/Versions.props b/eng/Versions.props
index a5802082fb8..8248454c00f 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -19,7 +19,7 @@
     <!-- F# Version components -->
     <FSMajorVersion>11</FSMajorVersion>
     <FSMinorVersion>0</FSMinorVersion>
-    <FSBuildVersion>100</FSBuildVersion>
+    <FSBuildVersion>101</FSBuildVersion>
     <FSRevisionVersion>0</FSRevisionVersion>
     <!-- -->
     <!-- F# Language version -->
diff --git a/eng/build.sh b/eng/build.sh
index d0d18712417..9a0ed19d046 100755
--- a/eng/build.sh
+++ b/eng/build.sh
@@ -40,6 +40,7 @@ usage()
   echo "  --fromVMR                      Set when building from within the VMR"
   echo "  --buildnorealsig               Build product with realsig- (default use realsig+ where necessary)"
   echo "  --tfm                          Override the default target framework"
+  echo "  --warnNotAsError <codes>       Suppress specific warnings from being treated as errors (semi-colon delimited)"
   echo ""
   echo "Command line arguments starting with '/p:' are passed through to MSBuild."
 }
@@ -80,6 +81,7 @@ product_build=false
 from_vmr=false
 buildnorealsig=true
 properties=""
+warn_not_as_error=""
 docker=false
 args=""
 
@@ -189,6 +191,10 @@ while [[ $# > 0 ]]; do
       tfm=$2
       shift
       ;;
+    --warnnotaserror)
+      warn_not_as_error=$2
+      shift
+      ;;
     /p:*)
       properties+=("$1")
       ;;
@@ -328,6 +334,11 @@ function BuildSolution {
     # do real build
     BuildMessage="Error building solution"
 
+    local msbuild_warn_not_as_error=""
+    if [[ "$warn_not_as_error" != "" && "$warn_as_error" == true ]]; then
+      msbuild_warn_not_as_error="/warnNotAsError:$warn_not_as_error"
+    fi
+
     MSBuild $toolset_build_proj \
       $bl \
       /p:Configuration=$configuration \
@@ -347,7 +358,8 @@ function BuildSolution {
       /p:DotNetBuild=$product_build \
       /p:DotNetBuildSourceOnly=$source_build \
       /p:DotNetBuildFromVMR=$from_vmr \
-      ${properties[@]+"${properties[@]}"}
+      ${properties[@]+"${properties[@]}"} \
+      $msbuild_warn_not_as_error
   fi
 }