Merge branches 'exp/privatize-cache' (#9330) and 'exp/undo-GeneratingBindingRedirects-touch' (#9338) into vs17.8

eng/Versions.props

@@ -2,7 +2,7 @@
 <!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the MIT license. See License.txt in the project root for full license information. -->
 <Project>
   <PropertyGroup>
-    <VersionPrefix>17.8.2</VersionPrefix><DotNetFinalVersionKind>release</DotNetFinalVersionKind>
+    <VersionPrefix>17.8.3</VersionPrefix><DotNetFinalVersionKind>release</DotNetFinalVersionKind>
     <PackageValidationBaselineVersion>17.7.0</PackageValidationBaselineVersion>
     <AssemblyVersion>15.1.0.0</AssemblyVersion>
     <PreReleaseVersionLabel>preview</PreReleaseVersionLabel>

src/Tasks.UnitTests/GenerateBindingRedirects_Tests.cs

@@ -291,7 +291,8 @@ namespace Microsoft.Build.Tasks.UnitTests
             redirectResults2.TargetAppConfigContent.ShouldContain("<assemblyIdentity name=\"System\" publicKeyToken=\"b77a5c561934e089\" culture=\"neutral\" />");
             redirectResults2.TargetAppConfigContent.ShouldContain("newVersion=\"40.0.0.0\"");
 
-            File.GetLastWriteTime(outputAppConfigFile).ShouldBeGreaterThan(oldTimestamp);
+            File.GetCreationTime(outputAppConfigFile).ShouldBe(oldTimestamp, TimeSpan.FromSeconds(5));
+            File.GetLastWriteTime(outputAppConfigFile).ShouldBe(oldTimestamp, TimeSpan.FromSeconds(5));
         }
 
         private BindingRedirectsExecutionResult GenerateBindingRedirects(string appConfigFile, string targetAppConfigFile,

src/Tasks/AssemblyDependency/GenerateBindingRedirects.cs

@@ -1,4 +1,4 @@
-// Licensed to the .NET Foundation under one or more agreements.
+// Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System;
@@ -139,13 +139,6 @@ namespace Microsoft.Build.Tasks
                     doc.Save(stream);
                 }
             }
-            else if (outputExists)
-            {
-                // if the file exists and the content is up to date, then touch the output file.
-                var now = DateTime.Now;
-                File.SetLastAccessTime(OutputAppConfigFile.ItemSpec, now);
-                File.SetLastWriteTime(OutputAppConfigFile.ItemSpec, now);
-            }
 
             return !Log.HasLoggedErrors;
         }