Move to GA SDK. (#257)

Author: phil-allen-msft

azure-pipelines-pr.yml

@@ -50,5 +50,10 @@ stages:
         - checkout: self
           clean: true
 
+        - task: UseDotNet@2
+          displayName: 'Install .NET SDK'
+          inputs:
+            useGlobalJson: true
+
         - script: eng\common\cibuild.cmd -configuration $(_BuildConfig) -prepareMachine $(_BuildArgs)
           displayName: Build and Test

global.json

@@ -1,12 +1,13 @@
 {
   "tools": {
-    "dotnet": "9.0.100-preview.5.24307.3",
+    "dotnet": "9.0.100",
     "vs": {
       "version": "17.8.0"
     }
   },
   "sdk": {
-    "version": "9.0.100-preview.5.24307.3"
+    "version": "9.0.100",
+    "rollForward": "latestFeature"
   },
   "msbuild-sdks": {
     "Microsoft.DotNet.Arcade.Sdk": "9.0.0-beta.24401.1"