Use RC1 SDK

eng/Versions.props

@@ -57,7 +57,7 @@
     <SystemRuntimeCompilerServicesUnsafeVersion>6.0.0</SystemRuntimeCompilerServicesUnsafeVersion>
   </PropertyGroup>
   <PropertyGroup Condition="!$(TargetFramework.StartsWith('net4'))">
-    <BootstrapSdkVersion>9.0.100-preview.7.24407.12</BootstrapSdkVersion>
+    <BootstrapSdkVersion>9.0.100-rc.1.24452.12</BootstrapSdkVersion>
   </PropertyGroup>
   <Target Name="OverrideArcadeFileVersion" AfterTargets="_InitializeAssemblyVersion">
     <!-- See https://github.com/dotnet/arcade/issues/3386

eng/cibuild_bootstrapped_msbuild.ps1

@@ -86,7 +86,7 @@ try {
   {
     $buildToolPath = Join-Path $bootstrapRoot "core\dotnet.exe"
     # The version must be consistent with BootstrapSdkVersion
-    $buildToolCommand = Join-Path $bootstrapRoot "core\sdk\9.0.100-preview.7.24407.12\MSBuild.dll"
+    $buildToolCommand = Join-Path $bootstrapRoot "core\sdk\9.0.100-rc.1.24452.12\MSBuild.dll"
     $buildToolFramework = "net9.0"
   }
 

eng/cibuild_bootstrapped_msbuild.sh

@@ -60,7 +60,7 @@ if [ $host_type = "core" ]
 then
   _InitializeBuildTool="$bootstrapRoot/core/dotnet"
   # The version must be consistent with BootstrapSdkVersion
-  _InitializeBuildToolCommand="$bootstrapRoot/core/sdk/9.0.100-preview.7.24407.12/MSBuild.dll"
+  _InitializeBuildToolCommand="$bootstrapRoot/core/sdk/9.0.100-rc.1.24452.12/MSBuild.dll"
   _InitializeBuildToolFramework="net9.0"
 else
   echo "Unsupported hostType ($host_type)"

global.json

@@ -3,7 +3,7 @@
     "allowPrerelease": true
   },
   "tools": {
-    "dotnet": "9.0.100-preview.7.24407.12",
+    "dotnet": "9.0.100-rc.1.24452.12",
     "vs": {
       "version": "17.8.0"
     },