Different behavior templating engine macOS & Windows

[jfversluis]

Product

dotnet CLI (dotnet new)

Describe The Bug

On the .NET MAUI repo we have this pull request by @MiYanni.

I was going to try and see if I could get that ready to be merged, pulled down the code but couldn't get it to work. This was on macOS. Then I decided to try and do the same on my Windows machine, and there it did work!

This seems to indicate that there is a difference in behavior between macOS and Windows in the templating engine?

To Reproduce

Steps:

On both Windows and macOS to see the differences

1. Clone .NET MAUI repo
2. Switch to this PR You can now just use the main branch as the PR has been merged in the meantime.
3. Open a terminal in the src/Templates folder
4. Run dotnet pack src/Microsoft.Maui.Templates.csproj from the terminal
5. Run dotnet new install {resulting nupkg from previous command}
6. Run dotnet new maui -n a\&b on macOS or dotnet new maui -n a``&b on Windows using PowerShell
7. Open the resulting csproj file for the new project and observe that on Windows the & is replaced with & while on macOS it still is the ampersand character causing MSBuild to fail

Note that running the same command from pwsh on macOS does not change the behavior

dotnet Info

output macOS

.NET SDK: Version: 9.0.100-preview.4.24267.66 Commit: 26d3d259e4 Workload version: 9.0.100-manifests.c1ac419f MSBuild version: 17.11.0-preview-24225-01+bd0b1e466

Runtime Environment:
OS Name: Mac OS X
OS Version: 14.5
OS Platform: Darwin
RID: osx-arm64
Base Path: /usr/local/share/dotnet/sdk/9.0.100-preview.4.24267.66/

.NET workloads installed:
There are no installed workloads to display.

Host:
Version: 9.0.0-preview.4.24266.19
Architecture: arm64
Commit: d0d6fed6c0

.NET SDKs installed:
6.0.408 [/usr/local/share/dotnet/sdk]
6.0.410 [/usr/local/share/dotnet/sdk]
6.0.416 [/usr/local/share/dotnet/sdk]
6.0.418 [/usr/local/share/dotnet/sdk]
6.0.419 [/usr/local/share/dotnet/sdk]
8.0.100-preview.7.23376.3 [/usr/local/share/dotnet/sdk]
8.0.100-rc.2.23502.2 [/usr/local/share/dotnet/sdk]
8.0.100 [/usr/local/share/dotnet/sdk]
8.0.101 [/usr/local/share/dotnet/sdk]
8.0.201 [/usr/local/share/dotnet/sdk]
8.0.203 [/usr/local/share/dotnet/sdk]
8.0.204 [/usr/local/share/dotnet/sdk]
8.0.300 [/usr/local/share/dotnet/sdk]
9.0.100-preview.2.24157.14 [/usr/local/share/dotnet/sdk]
9.0.100-preview.3.24204.13 [/usr/local/share/dotnet/sdk]
9.0.100-preview.4.24267.66 [/usr/local/share/dotnet/sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 6.0.16 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 6.0.18 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 6.0.24 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 6.0.26 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 6.0.27 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.5 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.7 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.13 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.15 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.16 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.0-preview.7.23375.9 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.0-rc.2.23480.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.0 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.1 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.3 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.4 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.5 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.0-preview.2.24128.4 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.0-preview.3.24172.13 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.0-preview.4.24267.6 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 6.0.16 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.18 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.24 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.26 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.27 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.5 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.7 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.13 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.15 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.16 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.0-preview.7.23375.6 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.0-rc.2.23479.6 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.0 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.1 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.2 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.3 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.4 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.5 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.0-preview.2.24128.5 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.0-preview.3.24172.9 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.0-preview.4.24266.19 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

Other architectures found:
x64 [/usr/local/share/dotnet/x64]

Environment variables:
Not set

global.json file:
Not found

output Windows

.NET SDK: Version: 8.0.400-preview.0.24276.1 Commit: f136c4dc56 Workload version: 8.0.400-manifests.902f28f1 MSBuild version: 17.11.0-preview-24273-01+147ecadd1

Runtime Environment:
OS Name: Windows
OS Version: 10.0.26120
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\8.0.400-preview.0.24276.1\

.NET workloads installed:
Configured to use loose manifests when installing new manifests.
[maui-windows]
Installation Source: VS 17.11.35002.39, VS 17.11.34929.205
Manifest Version: 8.0.40/8.0.100
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.maui\8.0.40\WorkloadManifest.json
Install Type: FileBased

[maccatalyst]
Installation Source: VS 17.11.35002.39, VS 17.11.34929.205
Manifest Version: 17.2.8062/8.0.100
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.maccatalyst\17.2.8062\WorkloadManifest.json
Install Type: FileBased

[ios]
Installation Source: VS 17.11.35002.39, VS 17.11.34929.205
Manifest Version: 17.2.8062/8.0.100
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.ios\17.2.8062\WorkloadManifest.json
Install Type: FileBased

[android]
Installation Source: VS 17.11.35002.39, VS 17.11.34929.205
Manifest Version: 34.0.113/8.0.100
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.android\34.0.113\WorkloadManifest.json
Install Type: FileBased

[wasm-tools-net7]
Installation Source: VS 17.11.35002.39
Manifest Version: 8.0.5/8.0.100
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.workload.mono.toolchain.net7\8.0.5\WorkloadManifest.json
Install Type: FileBased

[aspire]
Installation Source: VS 17.11.35002.39, VS 17.11.34929.205
Manifest Version: 8.1.0-preview.1.24259.4/8.0.100
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.aspire\8.1.0-preview.1.24259.4\WorkloadManifest.json
Install Type: FileBased

Host:
Version: 8.0.5
Architecture: x64
Commit: 087e15321b

.NET SDKs installed:
8.0.300 [C:\Program Files\dotnet\sdk]
8.0.400-preview.0.24276.1 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 6.0.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.19 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 6.0.30 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.19 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 6.0.30 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 7.0.19 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.5 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
x86 [C:\Program Files (x86)\dotnet]
registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
Not set

global.json file:
Not found

Visual Studio Version

No response

Additional context

No response