Revert to ProcessArchitecture (OSArchitecture was incorrect)

Copilot · baronfel · baronfel · commit 9bbaa45a4e0c · 2025-10-13T12:36:15.000-05:00
Co-authored-by: baronfel &lt;573979+baronfel@users.noreply.github.com&gt;
diff --git a/src/Cli/dotnet/MixedInstallationDetector.cs b/src/Cli/dotnet/MixedInstallationDetector.cs
@@ -25,7 +25,7 @@ internal static class MixedInstallationDetector
             // Use 32-bit registry view as specified in the spec
             try
             {
-                string arch = RuntimeInformation.OSArchitecture.ToString().ToLowerInvariant();
+                string arch = RuntimeInformation.ProcessArchitecture.ToString().ToLowerInvariant();
                 using (var hklm = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry32))
                 using (var key = hklm.OpenSubKey($@"SOFTWARE\dotnet\Setup\InstalledVersions\{arch}"))
                 {
@@ -49,7 +49,7 @@ internal static class MixedInstallationDetector
             // Linux/macOS: Read from /etc/dotnet/install_location or /etc/dotnet/install_location_<arch>
             try
             {
-                string arch = RuntimeInformation.OSArchitecture.ToString().ToLowerInvariant();
+                string arch = RuntimeInformation.ProcessArchitecture.ToString().ToLowerInvariant();
                 string archSpecificPath = $"/etc/dotnet/install_location_{arch}";
                 string defaultPath = "/etc/dotnet/install_location";
 

Original file line number	Diff line number	Diff line change
`@@ -25,7 +25,7 @@ internal static class MixedInstallationDetector`
`25`	`25`	`// Use 32-bit registry view as specified in the spec`
`26`	`26`	`try`
`27`	`27`	`{`
`28`		`- string arch = RuntimeInformation.OSArchitecture.ToString().ToLowerInvariant();`
	`28`	`+ string arch = RuntimeInformation.ProcessArchitecture.ToString().ToLowerInvariant();`
`29`	`29`	`using (var hklm = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry32))`
`30`	`30`	`using (var key = hklm.OpenSubKey($@"SOFTWARE\dotnet\Setup\InstalledVersions\{arch}"))`
`31`	`31`	`{`
`@@ -49,7 +49,7 @@ internal static class MixedInstallationDetector`
`49`	`49`	`// Linux/macOS: Read from /etc/dotnet/install_location or /etc/dotnet/install_location_<arch>`
`50`	`50`	`try`
`51`	`51`	`{`
`52`		`- string arch = RuntimeInformation.OSArchitecture.ToString().ToLowerInvariant();`
	`52`	`+ string arch = RuntimeInformation.ProcessArchitecture.ToString().ToLowerInvariant();`
`53`	`53`	`string archSpecificPath = $"/etc/dotnet/install_location_{arch}";`
`54`	`54`	`string defaultPath = "/etc/dotnet/install_location";`
`55`	`55`