diff --git a/eng/pipelines/common/templates/runtimes/run-test-job.yml b/eng/pipelines/common/templates/runtimes/run-test-job.yml
index 1b1bf6a04815d..38088e51f405f 100644
--- a/eng/pipelines/common/templates/runtimes/run-test-job.yml
+++ b/eng/pipelines/common/templates/runtimes/run-test-job.yml
@@ -244,7 +244,7 @@ jobs:
     # Compose the Core_Root folder containing all artifacts needed for running
     # CoreCLR tests. This step also compiles the framework using Crossgen2
     # in ReadyToRun jobs.
-    - script: $(Build.SourcesDirectory)/src/tests/build$(scriptExt) generatelayoutonly $(logRootNameArg)Layout $(runtimeFlavorArgs) $(crossgenArg) $(buildConfig) $(archType) $(crossArg) $(priorityArg) $(librariesOverrideArg) $(runtimeVariantArg)
+    - script: $(Build.SourcesDirectory)/src/tests/build$(scriptExt) generatelayoutonly $(logRootNameArg)Layout $(runtimeFlavorArgs) $(crossgenArg) $(buildConfig) $(archType) $(crossArg) $(priorityArg) $(librariesOverrideArg) $(runtimeVariantArg) -ci
       displayName: Generate CORE_ROOT
 
     # Build a Mono LLVM AOT cross-compiler for non-amd64 targets (in this case, just arm64)
diff --git a/src/coreclr/scripts/superpmi.py b/src/coreclr/scripts/superpmi.py
index 34dd5a305a6f5..5135e28428146 100644
--- a/src/coreclr/scripts/superpmi.py
+++ b/src/coreclr/scripts/superpmi.py
@@ -693,14 +693,6 @@ def __init__(self, coreclr_args):
             self.pmi_location = determine_pmi_location(coreclr_args)
             self.corerun = os.path.join(self.core_root, self.corerun_tool_name)
 
-        if coreclr_args.crossgen2:
-            self.corerun = os.path.join(self.core_root, self.corerun_tool_name)
-            if coreclr_args.dotnet_tool_path is None:
-                self.crossgen2_driver_tool = self.corerun
-            else:
-                self.crossgen2_driver_tool = coreclr_args.dotnet_tool_path
-            logging.debug("Using crossgen2 driver tool %s", self.crossgen2_driver_tool)
-
         if coreclr_args.pmi or coreclr_args.crossgen2:
             self.assemblies = coreclr_args.assemblies
             self.exclude = coreclr_args.exclude
@@ -1066,7 +1058,7 @@ async def run_crossgen2(print_prefix, assembly, self):
                     #
                     # invoke with:
                     #
-                    # dotnet <Core_Root>\crossgen2\crossgen2.dll @<temp.rsp>
+                    # <Core_Root>\crossgen2\crossgen2.exe @<temp.rsp>
                     #
                     # where "dotnet" is one of:
                     # 1. <runtime_root>\dotnet.cmd/sh
@@ -1089,7 +1081,7 @@ async def run_crossgen2(print_prefix, assembly, self):
                     # Log what is in the response file
                     write_file_to_log(rsp_filepath)
 
-                    command = [self.crossgen2_driver_tool, self.coreclr_args.crossgen2_tool_path, "@" + rsp_filepath]
+                    command = [self.coreclr_args.crossgen2_tool_path, "@" + rsp_filepath]
                     command_string = " ".join(command)
                     logging.debug("%s%s", print_prefix, command_string)
 
@@ -4913,7 +4905,8 @@ def verify_base_diff_args():
 
         if coreclr_args.crossgen2:
             # Can we find crossgen2?
-            crossgen2_tool_name = "crossgen2.dll"
+
+            crossgen2_tool_name = "crossgen2.exe" if platform.system() == "Windows" else "crossgen2"
             crossgen2_tool_path = os.path.abspath(os.path.join(coreclr_args.core_root, "crossgen2", crossgen2_tool_name))
             if not os.path.exists(crossgen2_tool_path):
                 print("`--crossgen2` is specified, but couldn't find " + crossgen2_tool_path + ". (Is it built?)")
diff --git a/src/coreclr/tools/aot/crossgen2/crossgen2_publish.csproj b/src/coreclr/tools/aot/crossgen2/crossgen2_publish.csproj
index aebad93eae08e..25bfcc096d934 100644
--- a/src/coreclr/tools/aot/crossgen2/crossgen2_publish.csproj
+++ b/src/coreclr/tools/aot/crossgen2/crossgen2_publish.csproj
@@ -37,6 +37,7 @@
   <Import Project="$(RepositoryEngineeringDir)codeOptimization.targets" />
 
   <PropertyGroup Condition="'$(UseNativeAotForComponents)' == 'true'">
+    <PublishAot>true</PublishAot>
     <IlcToolsPath>$(CoreCLRILCompilerDir)</IlcToolsPath>
     <IlcToolsPath Condition="'$(CrossBuild)' == 'true' or '$(BuildArchitecture)' != '$(TargetArchitecture)' or '$(EnableNativeSanitizers)' != ''">$(CoreCLRCrossILCompilerDir)</IlcToolsPath>
     <SysRoot Condition="('$(CrossBuild)' == 'true' or '$(BuildArchitecture)' != '$(TargetArchitecture)') and '$(HostOS)' != 'windows'">$(ROOTFS_DIR)</SysRoot>
diff --git a/src/coreclr/tools/r2rtest/Crossgen2Runner.cs b/src/coreclr/tools/r2rtest/Crossgen2Runner.cs
index a93532e6382cb..e9024d58da3a0 100644
--- a/src/coreclr/tools/r2rtest/Crossgen2Runner.cs
+++ b/src/coreclr/tools/r2rtest/Crossgen2Runner.cs
@@ -24,15 +24,19 @@ class Crossgen2RunnerOptions
     class Crossgen2Runner : CompilerRunner
     {
         private Crossgen2RunnerOptions Crossgen2RunnerOptions;
-        public override CompilerIndex Index => CompilerIndex.CPAOT;
+        private bool IsAssembly => _options.Crossgen2Path != null && _options.Crossgen2Path.FullName.EndsWith(".dll");
 
-        // Crossgen2 runs on top of corerun.
+        // Crossgen2 runs as a standalone binary
         protected override string CompilerRelativePath => "";
+        protected override string CompilerFileName => "";
+
+        protected override string CompilerPath => IsAssembly ? _options.DotNetCli : _options.Crossgen2Path?.FullName
+            ?? Path.Combine(_options.CoreRootDirectory.FullName, "crossgen2", RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? "crossgen2.exe" : "crossgen2");
+
+        public override CompilerIndex Index => CompilerIndex.CPAOT;
 
-        protected override string CompilerFileName => _options.DotNetCli;
-        protected readonly List<string> _referenceFiles = new List<string>();
+        protected readonly List<string> _referenceFiles = new();
 
-        private string Crossgen2Path => _options.Crossgen2Path != null ? _options.Crossgen2Path.FullName : Path.Combine(_options.CoreRootDirectory.FullName, "crossgen2", "crossgen2.dll");
         private bool CompositeMode => Crossgen2RunnerOptions != null ? Crossgen2RunnerOptions.Composite : _options.Composite;
 
         public Crossgen2Runner(BuildOptions options, Crossgen2RunnerOptions crossgen2RunnerOptions, IEnumerable<string> references, string overrideOutputPath = null)
@@ -64,7 +68,9 @@ public Crossgen2Runner(BuildOptions options, Crossgen2RunnerOptions crossgen2Run
         public override ProcessParameters CompilationProcess(string outputFileName, IEnumerable<string> inputAssemblyFileNames)
         {
             ProcessParameters processParameters = base.CompilationProcess(outputFileName, inputAssemblyFileNames);
-            processParameters.Arguments = $"{Crossgen2Path} {processParameters.Arguments}";
+            if (IsAssembly)
+                processParameters.Arguments = $"{_options.Crossgen2Path.FullName} {processParameters.Arguments}";
+
             // DOTNET_ variables
             processParameters.EnvironmentOverrides["DOTNET_GCStress"] = "";
             processParameters.EnvironmentOverrides["DOTNET_HeapVerify"] = "";
@@ -76,6 +82,7 @@ public override ProcessParameters CompilationProcess(string outputFileName, IEnu
             processParameters.EnvironmentOverrides["COMPlus_HeapVerify"] = "";
             processParameters.EnvironmentOverrides["COMPlus_ReadyToRun"] = "";
             processParameters.EnvironmentOverrides["COMPlus_GCName"] = "";
+
             return processParameters;
         }
 
diff --git a/src/tests/Common/CLRTest.CrossGen.targets b/src/tests/Common/CLRTest.CrossGen.targets
index cacc3980c1a1d..27bcd1c1ccfc3 100644
--- a/src/tests/Common/CLRTest.CrossGen.targets
+++ b/src/tests/Common/CLRTest.CrossGen.targets
@@ -85,16 +85,17 @@ if [ ! -z ${RunCrossGen2+x} ]%3B then
         __ResponseFile="$__OutputFile.rsp"
         rm $__ResponseFile 2>/dev/null
 
-        __Command=$_DebuggerFullPath
+        __R2RDumpCommand=$_DebuggerFullPath
         # Tests run locally need __TestDotNetCmd (set by runtest.py) or a compatible 5.0 dotnet runtime in the path
         if [ ! -z ${__TestDotNetCmd+x} ] %3B then
-            __Command+=" $__TestDotNetCmd"
+            __R2RDumpCommand+=" $__TestDotNetCmd"
         else
-            __Command+=" dotnet"
+            __R2RDumpCommand+=" dotnet"
         fi
-        __R2RDumpCommand=$__Command" $CORE_ROOT/R2RDump/R2RDump.dll"
+        __R2RDumpCommand+=" $CORE_ROOT/R2RDump/R2RDump.dll"
         __R2RDumpCommand+=" --header --sc --in $__OutputFile --out $__OutputFile.r2rdump --val"
-        __Command+=" $CORE_ROOT/crossgen2/crossgen2.dll"
+
+        __Command="$_DebuggerFullPath $CORE_ROOT/crossgen2/crossgen2"
         __Command+=" @$__ResponseFile"
         __Command+=" $ExtraCrossGen2Args"
 
@@ -247,11 +248,10 @@ if defined RunCrossGen2 (
     ) else (
         set __DotNet="dotnet"
     )
-    set __Command=!_DebuggerFullPath!
-    set __Command=!__Command! !__DotNet!
-    set __R2RDumpCommand=!__Command! "!CORE_ROOT!\r2rdump\r2rdump.dll"
+    set __R2RDumpCommand=!_DebuggerFullPath! !__DotNet! "!CORE_ROOT!\r2rdump\r2rdump.dll"
     set __R2RDumpCommand=!__R2RDumpCommand! --header --sc --in !__OutputFile! --out !__OutputFile!.r2rdump --val
-    set __Command=!__Command! "!CORE_ROOT!\crossgen2\crossgen2.dll"
+
+    set __Command=!_DebuggerFullPath! "!CORE_ROOT!\crossgen2\crossgen2.exe"
     set __Command=!__Command! @"!__ResponseFile!"
     set __Command=!__Command! !ExtraCrossGen2Args!
     echo !__InputFile!>>!__ResponseFile!
diff --git a/src/tests/Common/Directory.Build.targets b/src/tests/Common/Directory.Build.targets
index ae168e70984cc..6d5960ab2bff1 100644
--- a/src/tests/Common/Directory.Build.targets
+++ b/src/tests/Common/Directory.Build.targets
@@ -18,6 +18,7 @@
     <CopyCoreDisToolsToCoreRoot Condition="$(GCStressDependsOnCoreDisTools) And '$(DotNetBuildSourceOnly)' != 'true'">true</CopyCoreDisToolsToCoreRoot>
     <!-- Non-desktop OS's use a custom dotnet host, instead of corerun -->
     <IsDesktopOS Condition="'$(TargetsBrowser)' != 'true' and '$(TargetsAndroid)' != 'true' and '$(TargetstvOS)' != 'true' and '$(TargetsiOS)' != 'true' and '$(TargetsMacCatalyst)' != 'true'">true</IsDesktopOS>
+    <Crossgen2Supported Condition="'$(RuntimeFlavor)' == 'coreclr' and '$(TestBuildMode)' != 'nativeaot'">true</Crossgen2Supported>
   </PropertyGroup>
 
   <Import Project="$(RepositoryEngineeringDir)coredistools.targets" Condition="$(CopyCoreDisToolsToCoreRoot)" />
@@ -34,7 +35,47 @@
   </ItemDefinitionGroup>
 
   <Target Name="CopyDependencyToCoreRoot"
-          DependsOnTargets="ResolveAssemblyReferences;ResolveRuntimeFilesFromLocalBuild">
+    DependsOnTargets="ResolveAssemblyReferences;ResolveRuntimeFilesFromLocalBuild">
+
+    <!-- Copy apphost to crossgen2_publish directory.
+        The default configuration between product and tests are flipped. When we build project like:
+        `build -c debug -rc checked`, the corresponding test command is `src/tests/build -checked -p:LibrariesConfiguration=debug`,
+        instead of `-debug -p:RuntimeConfiguration=checked`. That forces us to either pass the
+        `HostConfiguration=debug` explicitly or fix this disparity; both of which will break the dev workflow.
+        
+        As a workaround, we will first check if the directory pointed by `HostConfiguration` exists, then check
+        `LibrariesConfiguration`.
+    -->
+
+    <PropertyGroup Condition="'$(Crossgen2Supported)' == 'true'">
+      <_targetOS>$(TargetOS)</_targetOS>
+      <_targetOS Condition="'$(_targetOS)' == 'windows'">win</_targetOS>
+      <_apphostPath Condition="Exists('$(ArtifactsBinDir)$(_targetOS)-$(TargetArchitecture).$(HostConfiguration)\corehost\apphost$(ExeSuffix)')">$(ArtifactsBinDir)$(_targetOS)-$(TargetArchitecture).$(HostConfiguration)\corehost\apphost$(ExeSuffix)</_apphostPath>
+      <_apphostPath Condition="'$(_apphostPath)' == '' and Exists('$(ArtifactsBinDir)$(_targetOS)-$(TargetArchitecture).$(LibrariesConfiguration)\corehost\apphost$(ExeSuffix)')">$(ArtifactsBinDir)$(_targetOS)-$(TargetArchitecture).$(LibrariesConfiguration)\corehost\apphost$(ExeSuffix)</_apphostPath>
+      <_toolsConfiguration Condition="Exists('$(ArtifactsBinDir)ILLink.Tasks\$(ToolsConfiguration)\$(NetCoreAppToolCurrent)\ILLink.Tasks.dll')">$(ToolsConfiguration)</_toolsConfiguration>
+      <_toolsConfiguration Condition="Exists('$(ArtifactsBinDir)ILLink.Tasks\$(LibrariesConfiguration)\$(NetCoreAppToolCurrent)\ILLink.Tasks.dll')">$(LibrariesConfiguration)</_toolsConfiguration>
+    </PropertyGroup>
+
+    <MakeDir Condition="'$(Crossgen2Supported)' == 'true'" Directories="$(ArtifactsObjDir)coreclr\crossgen2_publish\$(TargetOS).$(TargetArchitecture).$(RuntimeConfiguration)" />
+
+    <Copy
+      SourceFiles="$(_apphostPath)"
+      DestinationFiles="$(ArtifactsObjDir)coreclr\crossgen2_publish\$(TargetOS).$(TargetArchitecture).$(RuntimeConfiguration)\apphost$(ExeSuffix)"
+      Condition="'$(Crossgen2Supported)' == 'true'" />
+
+    <!-- Publish crossgen2 on supported platforms. -->
+
+    <MSBuild Condition="'$(Crossgen2Supported)' == 'true'"
+      Targets="Restore"
+      BuildInParallel="true"
+      Properties="NativeAotSupported=$(NativeAotSupported);UseNativeAotForComponents=$(UseNativeAotForComponents);ToolsConfiguration=$(_toolsConfiguration);MSBuildRestoreSessionId=$([System.Guid]::NewGuid());"
+      Projects="$(InstallerProjectRoot)pkg\sfx\Microsoft.NETCore.App\Microsoft.NETCore.App.Crossgen2.sfxproj" />
+
+    <MSBuild Condition="'$(Crossgen2Supported)' == 'true'"
+      Targets="PublishToDisk"
+      BuildInParallel="true"
+      Properties="NativeAotSupported=$(NativeAotSupported);UseNativeAotForComponents=$(UseNativeAotForComponents);ToolsConfiguration=$(_toolsConfiguration);OutputPath=$(CORE_ROOT)\crossgen2;"
+      Projects="$(InstallerProjectRoot)pkg\sfx\Microsoft.NETCore.App\Microsoft.NETCore.App.Crossgen2.sfxproj" />
 
     <ItemGroup>
       <RunTimeDependencyCopyLocal Include="@(RuntimeCopyLocalItems)" />
@@ -80,11 +121,6 @@
       <!-- Used by the Crossgen comparison job -->
       <RunTimeArtifactsIncludeFolders Include="IL/" TargetDir="IL/" />
 
-      <!-- Used for Crossgen2 R2R tests -->
-      <RunTimeArtifactsIncludeFolders Include="crossgen2/" TargetDir="crossgen2/">
-        <IncludeSubFolders>True</IncludeSubFolders>
-      </RunTimeArtifactsIncludeFolders>
-
       <!-- Used for NativeAOT tests -->
       <RunTimeArtifactsIncludeFolders Include="ilc-published/" TargetDir="ilc-published/">
         <IncludeSubFolders>True</IncludeSubFolders>
@@ -135,7 +171,7 @@
 
       <RunTimeDependencyCopyLocal
           Condition="'%(RuntimeArtifactsIncludeFolders.IncludeSubFolders)' == 'True'"
-          Include="$(CoreCLRArtifactsPath)%(RunTimeArtifactsIncludeFolders.Identity)**/*"
+          Include="$(CoreCLRArtifactsPath)%(RunTimeArtifactsIncludeFolders.Identity)**\*"
           Exclude="@(RunTimeArtifactsExcludeFiles -> '$(CoreCLRArtifactsPath)%(Identity)')"
           TargetDir="%(RunTimeArtifactsIncludeFolders.TargetDir)" />
     </ItemGroup>
@@ -223,7 +259,7 @@
 
     <Copy
       SourceFiles="@(RunTimeDependencyCopyLocal)"
-      DestinationFiles="@(RunTimeDependencyCopyLocal -> '$(CORE_ROOT)/%(TargetDir)%(RecursiveDir)%(Filename)%(Extension)')"
+      DestinationFiles="@(RunTimeDependencyCopyLocal -> '$(CORE_ROOT)\%(TargetDir)%(RecursiveDir)%(Filename)%(Extension)')"
       SkipUnchangedFiles="$(SkipCopyUnchangedFiles)"
       OverwriteReadOnlyFiles="$(OverwriteReadOnlyFiles)"
       Retries="$(CopyRetryCount)"
diff --git a/src/tests/baseservices/TieredCompilation/BasicTestWithMcj.csproj b/src/tests/baseservices/TieredCompilation/BasicTestWithMcj.csproj
index e04e74d55b327..f817cbeba5104 100644
--- a/src/tests/baseservices/TieredCompilation/BasicTestWithMcj.csproj
+++ b/src/tests/baseservices/TieredCompilation/BasicTestWithMcj.csproj
@@ -35,7 +35,7 @@ set "DOTNET_GCStress="
 set "DOTNET_HeapVerify="
 set "DOTNET_ReadyToRun="
 
-"%CORE_ROOT%\corerun" %CORE_ROOT%\crossgen2\crossgen2.dll --out r2r\$(MSBuildProjectName).dll $(MSBuildProjectName).dll -r %CORE_ROOT%\*.dll
+"%CORE_ROOT%\crossgen2\crossgen2.exe" --out r2r\$(MSBuildProjectName).dll $(MSBuildProjectName).dll -r %CORE_ROOT%\*.dll
 
 endlocal
 set CLRCustomTestLauncher=RunBasicTestWithMcj.cmd --runCustomTest
@@ -47,7 +47,7 @@ mkdir r2r
 # Suppress some DOTNET variables for the duration of Crossgen2 execution
 export -n DOTNET_GCName DOTNET_GCStress DOTNET_HeapVerify DOTNET_ReadyToRun
 
-"$CORE_ROOT/corerun" $CORE_ROOT/crossgen2/crossgen2.dll --out r2r/$(MSBuildProjectName).dll $(MSBuildProjectName).dll -r $CORE_ROOT/*.dll
+"$CORE_ROOT/crossgen2/crossgen2" --out r2r/$(MSBuildProjectName).dll $(MSBuildProjectName).dll -r $CORE_ROOT/*.dll
 
 export DOTNET_GCName DOTNET_GCStress DOTNET_HeapVerify DOTNET_ReadyToRun
 chmod +x ./RunBasicTestWithMcj.sh
diff --git a/src/tests/build.proj b/src/tests/build.proj
index 65ceee0cd7330..0c4f31133742c 100644
--- a/src/tests/build.proj
+++ b/src/tests/build.proj
@@ -651,8 +651,6 @@
       Condition="'$(__BuildTestWrappersOnly)' != '1' and '$(__CopyNativeTestBinaries)' != '1' and '$(__TestBuildMode)' == 'crossgen2' and !$(MonoAot) and !$(MonoFullAot)" >
 
     <PropertyGroup>
-      <CrossgenDir>$(__BinDir)\$(BuildArchitecture)</CrossgenDir>
-
       <CrossgenOutputDir>$(__TestIntermediatesDir)\crossgen.out</CrossgenOutputDir>
 
       <CrossgenCmd>$(DotNetCli)</CrossgenCmd>
@@ -672,7 +670,7 @@
       <CrossgenCmd Condition="'$(__CompositeBuildMode)' == ''">$(CrossgenCmd) --crossgen2-parallelism 1</CrossgenCmd>
 
       <CrossgenCmd>$(CrossgenCmd) --verify-type-and-field-layout</CrossgenCmd>
-      <CrossgenCmd>$(CrossgenCmd) --crossgen2-path "$(CrossgenDir)\crossgen2\tools\crossgen2.dll"</CrossgenCmd>
+      <CrossgenCmd>$(CrossgenCmd) --crossgen2-path "$(__BinDir)\$(BuildArchitecture)\crossgen2\tools\crossgen2.dll"</CrossgenCmd>
     </PropertyGroup>
 
     <Message Importance="High" Text="$(MsgPrefix)Compiling framework using Crossgen2: $(CrossgenCmd)" />
diff --git a/src/tests/readytorun/crossboundarylayout/buildcrossgen2image.cmd b/src/tests/readytorun/crossboundarylayout/buildcrossgen2image.cmd
index e75f4808a4d9e..dca44eeb371ab 100644
--- a/src/tests/readytorun/crossboundarylayout/buildcrossgen2image.cmd
+++ b/src/tests/readytorun/crossboundarylayout/buildcrossgen2image.cmd
@@ -48,7 +48,7 @@ goto Loop
 
 if "%COMPOSITENAME%"=="" goto done
 
-set BUILDCMD=%TESTBATCHROOT%\..\..\..\..\..\..\.dotnet\dotnet %CORE_ROOT%\crossgen2\crossgen2.dll -r %CORE_ROOT%\* -r %TESTINITIALBINPATH%\*.dll -o %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%Composite.dll --composite %COMPILEARG%
+set BUILDCMD=%CORE_ROOT%\crossgen2\crossgen2.exe -r %CORE_ROOT%\* -r %TESTINITIALBINPATH%\*.dll -o %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%Composite.dll --composite %COMPILEARG%
 echo %BUILDCMD% > %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%Composite.dll.log
 call %BUILDCMD% >> %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%Composite.dll.log 2>&1
 if NOT EXIST %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%Composite.dll del %TESTINITIALBINPATH%\%TESTTARGET_DIR%\a.dll
@@ -56,28 +56,28 @@ goto done
 
 :CG2Single
 del %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll
-set BUILDCMD=%TESTBATCHROOT%\..\..\..\..\..\..\.dotnet\dotnet %CORE_ROOT%\crossgen2\crossgen2.dll -r %CORE_ROOT%\* -r %TESTINITIALBINPATH%\*.dll -o %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll  %TESTINITIALBINPATH%\%COMPOSITENAME%.dll
+set BUILDCMD=%CORE_ROOT%\crossgen2\crossgen2.exe -r %CORE_ROOT%\* -r %TESTINITIALBINPATH%\*.dll -o %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll  %TESTINITIALBINPATH%\%COMPOSITENAME%.dll
 echo %BUILDCMD% > %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll.log
 call %BUILDCMD% >> %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll.log 2>&1
 goto done
 
 :CG2NoMethods
 del %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll
-set BUILDCMD=%TESTBATCHROOT%\..\..\..\..\..\..\.dotnet\dotnet %CORE_ROOT%\crossgen2\crossgen2.dll --compile-no-methods -r %CORE_ROOT%\* -r %TESTINITIALBINPATH%\*.dll -o %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll  %TESTINITIALBINPATH%\%COMPOSITENAME%.dll
+set BUILDCMD=%CORE_ROOT%\crossgen2\crossgen2.exe --compile-no-methods -r %CORE_ROOT%\* -r %TESTINITIALBINPATH%\*.dll -o %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll  %TESTINITIALBINPATH%\%COMPOSITENAME%.dll
 echo %BUILDCMD% > %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll.log
 call %BUILDCMD% >> %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll.log 2>&1
 goto done
 
 :CG2SingleInputBubble
 del %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll
-set BUILDCMD=%TESTBATCHROOT%\..\..\..\..\..\..\.dotnet\dotnet %CORE_ROOT%\crossgen2\crossgen2.dll -r %CORE_ROOT%\* -r %TESTINITIALBINPATH%\*.dll -o %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll --inputbubble %TESTINITIALBINPATH%\%COMPOSITENAME%.dll
+set BUILDCMD=%CORE_ROOT%\crossgen2\crossgen2.exe -r %CORE_ROOT%\* -r %TESTINITIALBINPATH%\*.dll -o %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll --inputbubble %TESTINITIALBINPATH%\%COMPOSITENAME%.dll
 echo %BUILDCMD% > %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll.log
 call %BUILDCMD% >> %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll.log 2>&1
 goto done
 
 :CG2SingleBubbleADOnly
 del %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll
-set BUILDCMD=%TESTBATCHROOT%\..\..\..\..\..\..\.dotnet\dotnet %CORE_ROOT%\crossgen2\crossgen2.dll -r %CORE_ROOT%\* -r %TESTINITIALBINPATH%\d.dll -o %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll --inputbubble %TESTINITIALBINPATH%\%COMPOSITENAME%.dll
+set BUILDCMD=%CORE_ROOT%\crossgen2\crossgen2.exe -r %CORE_ROOT%\* -r %TESTINITIALBINPATH%\d.dll -o %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll --inputbubble %TESTINITIALBINPATH%\%COMPOSITENAME%.dll
 echo %BUILDCMD% > %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll.log
 call %BUILDCMD% >> %TESTINITIALBINPATH%\%TESTTARGET_DIR%\%COMPOSITENAME%.dll.log 2>&1
 goto done
diff --git a/src/tests/readytorun/determinism/crossgen2determinism.csproj b/src/tests/readytorun/determinism/crossgen2determinism.csproj
index 30f34184583c1..a68f9bae1d47c 100644
--- a/src/tests/readytorun/determinism/crossgen2determinism.csproj
+++ b/src/tests/readytorun/determinism/crossgen2determinism.csproj
@@ -24,16 +24,16 @@
     <CLRTestBatchPreCommands><![CDATA[
 $(CLRTestBatchPreCommands)
 set CoreRT_DeterminismSeed=1
-%Core_Root%\CoreRun.exe %Core_Root%\crossgen2\crossgen2.dll --map -r:%Core_Root%\*.dll -r:.\crossgen2smoke\helperdll.dll -r:.\crossgen2smoke\helperildll.dll -o:crossgen2smoke1.ildll .\crossgen2smoke\crossgen2smoke.dll
+%Core_Root%\crossgen2\crossgen2.exe --map -r:%Core_Root%\*.dll -r:.\crossgen2smoke\helperdll.dll -r:.\crossgen2smoke\helperildll.dll -o:crossgen2smoke1.ildll .\crossgen2smoke\crossgen2smoke.dll
 set CoreRT_DeterminismSeed=2
-%Core_Root%\CoreRun.exe %Core_Root%\crossgen2\crossgen2.dll --map -r:%Core_Root%\*.dll -r:.\crossgen2smoke\helperdll.dll -r:.\crossgen2smoke\helperildll.dll -o:crossgen2smoke2.ildll .\crossgen2smoke\crossgen2smoke.dll
+%Core_Root%\crossgen2\crossgen2.exe --map -r:%Core_Root%\*.dll -r:.\crossgen2smoke\helperdll.dll -r:.\crossgen2smoke\helperildll.dll -o:crossgen2smoke2.ildll .\crossgen2smoke\crossgen2smoke.dll
 ]]></CLRTestBatchPreCommands>
     <CLRTestBashPreCommands><![CDATA[
 $(CLRTestBashPreCommands)
 export CoreRT_DeterminismSeed=1
-$CORE_ROOT/corerun $CORE_ROOT/crossgen2/crossgen2.dll --map -r:$CORE_ROOT/*.dll -r:./crossgen2smoke/helperdll.dll -r:./crossgen2smoke/helperildll.dll -o:crossgen2smoke1.ildll ./crossgen2smoke/crossgen2smoke.dll
+$CORE_ROOT/crossgen2/crossgen2 --map -r:$CORE_ROOT/*.dll -r:./crossgen2smoke/helperdll.dll -r:./crossgen2smoke/helperildll.dll -o:crossgen2smoke1.ildll ./crossgen2smoke/crossgen2smoke.dll
 export CoreRT_DeterminismSeed=2
-$CORE_ROOT/corerun $CORE_ROOT/crossgen2/crossgen2.dll --map -r:$CORE_ROOT/*.dll -r:./crossgen2smoke/helperdll.dll -r:./crossgen2smoke/helperildll.dll -o:crossgen2smoke2.ildll ./crossgen2smoke/crossgen2smoke.dll
+$CORE_ROOT/crossgen2/crossgen2 --map -r:$CORE_ROOT/*.dll -r:./crossgen2smoke/helperdll.dll -r:./crossgen2smoke/helperildll.dll -o:crossgen2smoke2.ildll ./crossgen2smoke/crossgen2smoke.dll
 ]]></CLRTestBashPreCommands>
   </PropertyGroup>
 </Project>
diff --git a/src/tests/readytorun/multifolder/multifolder.csproj b/src/tests/readytorun/multifolder/multifolder.csproj
index 1cf1e99bd976c..071c4158dfe63 100644
--- a/src/tests/readytorun/multifolder/multifolder.csproj
+++ b/src/tests/readytorun/multifolder/multifolder.csproj
@@ -56,13 +56,7 @@ $(CLRTestBatchPreCommands)
     set DOTNET_GCName=
 
     set __Command=%_DebuggerFullPath%
-    REM Tests run locally need __TestDotNetCmd (set by runtest.py) or a compatible 5.0 dotnet runtime in the path
-    if defined __TestDotNetCmd (
-        set __Command=!__Command! "!__TestDotNetCmd!"
-    ) else (
-        set __Command=!__Command! "dotnet"
-    )
-    set __Command=%__Command% "%CORE_ROOT%\crossgen2\crossgen2.dll"
+    set __Command=%__Command% "%CORE_ROOT%\crossgen2\crossgen2.exe"
     set __Command=%__Command% @"%__ResponseFile%"
 
     REM work around problems in 6.0 OSR
@@ -105,14 +99,7 @@ $(CLRTestBashPreCommands)
     # Suppress some DOTNET variables for the duration of Crossgen2 execution
     export -n DOTNET_GCName DOTNET_GCStress DOTNET_HeapVerify DOTNET_ReadyToRun DOTNET_TC_OnStackReplacement DOTNET_TC_PartialCompilation
 
-    __Command=$_DebuggerFullPath
-    # Tests run locally need __TestDotNetCmd (set by runtest.py) or a compatible 5.0 dotnet runtime in the path
-    if [ ! -z ${__TestDotNetCmd+x} ] %3B then
-        __Command+=" $__TestDotNetCmd"
-    else
-        __Command+=" dotnet"
-    fi
-    __Command+=" $CORE_ROOT/crossgen2/crossgen2.dll"
+    __Command="$_DebuggerFullPath $CORE_ROOT/crossgen2/crossgen2"
     __Command+=" @$__ResponseFile"
 
     echo Response file: $__ResponseFile
diff --git a/src/tests/readytorun/tests/mainv1.csproj b/src/tests/readytorun/tests/mainv1.csproj
index dba79aa2d2b35..8b16d14fffd53 100644
--- a/src/tests/readytorun/tests/mainv1.csproj
+++ b/src/tests/readytorun/tests/mainv1.csproj
@@ -44,9 +44,8 @@ if not exist IL_DLLS\mainv1.dll (
     echo FAILED to copy mainv1.dll to IL_DLLS
     exit /b 1
 )
-IF "%__TestDotNetCmd%"=="" set __TestDotNetCmd=dotnet
 
-%__TestDotNetCmd% %Core_Root%\crossgen2\crossgen2.dll --map -r:%Core_Root%\*.dll -r:%25CD%\IL_DLLS\fieldgetter.dll -r:%25CD%\IL_DLLS\mainv1.dll -o:test.dll testv1\test.dll
+%Core_Root%\crossgen2\crossgen2.exe --map -r:%Core_Root%\*.dll -r:%25CD%\IL_DLLS\fieldgetter.dll -r:%25CD%\IL_DLLS\mainv1.dll -o:test.dll testv1\test.dll
 
 set CrossGenStatus=!ERRORLEVEL!
 IF NOT !CrossGenStatus!==0 (
@@ -58,7 +57,7 @@ if not exist test.map (
     exit /b 1
 )
 
-%__TestDotNetCmd% %Core_Root%\crossgen2\crossgen2.dll --map -r:%Core_Root%\*.dll -r:%25CD%\IL_DLLS\mainv1.dll -r:testv1\test.dll -o:fieldgetter.dll IL_DLLS\fieldgetter.dll
+%Core_Root%\crossgen2\crossgen2.exe --map -r:%Core_Root%\*.dll -r:%25CD%\IL_DLLS\mainv1.dll -r:testv1\test.dll -o:fieldgetter.dll IL_DLLS\fieldgetter.dll
 
 set CrossGenStatus=!ERRORLEVEL!
 IF NOT !CrossGenStatus!==0 (
@@ -70,7 +69,7 @@ if not exist fieldgetter.map (
     exit /b 1
 )
 
-%__TestDotNetCmd% %Core_Root%\crossgen2\crossgen2.dll --map -r:%Core_Root%\*.dll -r:%25CD%\IL_DLLS\fieldgetter.dll -r:testv1\test.dll --opt-cross-module:test -o:mainv1.dll IL_DLLS\mainv1.dll
+%Core_Root%\crossgen2\crossgen2.exe --map -r:%Core_Root%\*.dll -r:%25CD%\IL_DLLS\fieldgetter.dll -r:testv1\test.dll --opt-cross-module:test -o:mainv1.dll IL_DLLS\mainv1.dll
 
 set CrossGenStatus=!ERRORLEVEL!
 IF NOT !CrossGenStatus!==0 (
@@ -112,7 +111,7 @@ then
   exit 1
 fi
 
-$CORE_ROOT/corerun $CORE_ROOT/crossgen2/crossgen2.dll --map -r:$CORE_ROOT/*.dll -r:IL_DLLS/fieldgetter.dll -r:IL_DLLS/mainv1.dll -o:test.dll testv1/test.dll
+"$CORE_ROOT"/crossgen2/crossgen2 --map -r:"$CORE_ROOT"/*.dll -r:IL_DLLS/fieldgetter.dll -r:IL_DLLS/mainv1.dll -o:test.dll testv1/test.dll
 
 __cgExitCode=$?
 if [ $__cgExitCode -ne 0 ]
@@ -126,7 +125,7 @@ then
   exit 1
 fi
 
-$CORE_ROOT/corerun $CORE_ROOT/crossgen2/crossgen2.dll --map -r:$CORE_ROOT/*.dll -r:testv1/test.dll -r:IL_DLLS/mainv1.dll -o:fieldgetter.dll IL_DLLS/fieldgetter.dll
+"$CORE_ROOT"/crossgen2/crossgen2 --map -r:"$CORE_ROOT"/*.dll -r:testv1/test.dll -r:IL_DLLS/mainv1.dll -o:fieldgetter.dll IL_DLLS/fieldgetter.dll
 
 __cgExitCode=$?
 if [ $__cgExitCode -ne 0 ]
@@ -140,7 +139,7 @@ then
   exit 1
 fi
 
-$CORE_ROOT/corerun $CORE_ROOT/crossgen2/crossgen2.dll --map -r:$CORE_ROOT/*.dll -r:testv1/test.dll -r:IL_DLLS/fieldgetter.dll --opt-cross-module:test -o:mainv1.dll IL_DLLS/mainv1.dll
+"$CORE_ROOT"/crossgen2/crossgen2 --map -r:"$CORE_ROOT"/*.dll -r:testv1/test.dll -r:IL_DLLS/fieldgetter.dll --opt-cross-module:test -o:mainv1.dll IL_DLLS/mainv1.dll
 
 __cgExitCode=$?
 if [ $__cgExitCode -ne 0 ]
diff --git a/src/tests/readytorun/tests/mainv2.csproj b/src/tests/readytorun/tests/mainv2.csproj
index 72e5d816629f0..4345632f63d3c 100644
--- a/src/tests/readytorun/tests/mainv2.csproj
+++ b/src/tests/readytorun/tests/mainv2.csproj
@@ -44,10 +44,8 @@ if not exist IL_DLLS\mainv2.dll (
     exit /b 1
 )
 
-IF "%__TestDotNetCmd%"=="" set __TestDotNetCmd=dotnet
-
 REM NOTE THAT THIS IS WHERE WE BUILD THE R2R IMAGE using V2 of test not V1
-%__TestDotNetCmd% %Core_Root%\crossgen2\crossgen2.dll --map -r:%Core_Root%\*.dll -r:%25CD%\IL_DLLS\fieldgetter.dll -r:%25CD%\IL_DLLS\mainv2.dll -o:test.dll testv2\test.dll
+%Core_Root%\crossgen2\crossgen2.exe --map -r:%Core_Root%\*.dll -r:%25CD%\IL_DLLS\fieldgetter.dll -r:%25CD%\IL_DLLS\mainv2.dll -o:test.dll testv2\test.dll
 
 set CrossGenStatus=!ERRORLEVEL!
 IF NOT !CrossGenStatus!==0 (
@@ -59,7 +57,7 @@ if not exist test.map (
     exit /b 1
 )
 
-%__TestDotNetCmd% %Core_Root%\crossgen2\crossgen2.dll --map -r:%Core_Root%\*.dll -r:%25CD%\IL_DLLS\mainv2.dll -r:testv1\test.dll -o:fieldgetter.dll IL_DLLS\fieldgetter.dll
+%Core_Root%\crossgen2\crossgen2.exe --map -r:%Core_Root%\*.dll -r:%25CD%\IL_DLLS\mainv2.dll -r:testv1\test.dll -o:fieldgetter.dll IL_DLLS\fieldgetter.dll
 
 set CrossGenStatus=!ERRORLEVEL!
 IF NOT !CrossGenStatus!==0 (
@@ -71,7 +69,7 @@ if not exist fieldgetter.map (
     exit /b 1
 )
 
-%__TestDotNetCmd% %Core_Root%\crossgen2\crossgen2.dll --map -r:%Core_Root%\*.dll -r:%25CD%\IL_DLLS\fieldgetter.dll -r:testv1\test.dll --opt-cross-module:test -o:mainv2.dll IL_DLLS\mainv2.dll
+%Core_Root%\crossgen2\crossgen2.exe --map -r:%Core_Root%\*.dll -r:%25CD%\IL_DLLS\fieldgetter.dll -r:testv1\test.dll --opt-cross-module:test -o:mainv2.dll IL_DLLS\mainv2.dll
 
 set CrossGenStatus=!ERRORLEVEL!
 IF NOT !CrossGenStatus!==0 (
@@ -114,7 +112,7 @@ then
 fi
 
 # NOTE THAT THIS IS WHERE WE BUILD THE R2R IMAGE using V2 of test not V1
-$CORE_ROOT/corerun $CORE_ROOT/crossgen2/crossgen2.dll --map -r:$CORE_ROOT/*.dll -r:IL_DLLS/fieldgetter.dll -r:IL_DLLS/mainv2.dll -o:test.dll testv2/test.dll
+$CORE_ROOT/crossgen2/crossgen2 --map -r:$CORE_ROOT/*.dll -r:IL_DLLS/fieldgetter.dll -r:IL_DLLS/mainv2.dll -o:test.dll testv2/test.dll
 
 __cgExitCode=$?
 if [ $__cgExitCode -ne 0 ]
@@ -128,7 +126,7 @@ then
   exit 1
 fi
 
-$CORE_ROOT/corerun $CORE_ROOT/crossgen2/crossgen2.dll --map -r:$CORE_ROOT/*.dll -r:testv1/test.dll -r:IL_DLLS/mainv2.dll -o:fieldgetter.dll IL_DLLS/fieldgetter.dll
+$CORE_ROOT/crossgen2/crossgen2 --map -r:$CORE_ROOT/*.dll -r:testv1/test.dll -r:IL_DLLS/mainv2.dll -o:fieldgetter.dll IL_DLLS/fieldgetter.dll
 
 __cgExitCode=$?
 if [ $__cgExitCode -ne 0 ]
@@ -142,7 +140,7 @@ then
   exit 1
 fi
 
-$CORE_ROOT/corerun $CORE_ROOT/crossgen2/crossgen2.dll --map -r:$CORE_ROOT/*.dll -r:testv1/test.dll -r:IL_DLLS/fieldgetter.dll --opt-cross-module:test -o:mainv2.dll IL_DLLS/mainv2.dll
+$CORE_ROOT/crossgen2/crossgen2 --map -r:$CORE_ROOT/*.dll -r:testv1/test.dll -r:IL_DLLS/fieldgetter.dll --opt-cross-module:test -o:mainv2.dll IL_DLLS/mainv2.dll
 
 __cgExitCode=$?
 if [ $__cgExitCode -ne 0 ]