Code generators having issues with projects with System in namespace

[Scharps]

Description

When creating a Blazor Maui project e.g. Alpha.System.Beta, errors appear on build; "The type or namespace name 'Collections' does not exist in the namespace 'Alpha.System' (are you missing an assembly reference?" File 'Main_razor.g.cs' etc.

Steps to Reproduce

1. Create a Maui Blazor application with name "X.System.Y".

Version with bug

6.0.400 (current)

Last version that worked well

Unknown/Other

Affected platforms

I was not able test on other platforms

Affected platform versions

windows10.0.19041.0

Did you find any workaround?

No response

Relevant log output

No response

[Eilon]

Possibly some generated code is missing a global::? I know we've had issues like this before, so maybe this is fixed in later versions, or we're still missing a fix?

[Eilon]

Confirmed repro on latest VS Preview with SDK 6.0.400-*.

[Eilon]

Confirmed this also happens in a Blazor Server app using SDK 6.0.400-*.

[Eilon]

This also happens with SDK 7.0.100-preview.5.22307.18. I installed that version, did dotnet new blazorserver -o Alpha.System.Charlie2, and got these errors running dotnet build:

C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\App_razor.g.cs(8,18): error CS0234: The type or namespace name 'Collections' does not exist in the namespace 'Alpha.System' (are you missin
g an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\App_razor.g.cs(9,18): error CS0234: The type or namespace name 'Linq' does not exist in the namespace 'Alpha.System' (are you missing an as
sembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\App_razor.g.cs(10,18): error CS0234: The type or namespace name 'Threading' does not exist in the namespace 'Alpha.System' (are you missing
 an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\_Imports.razor(1,14): error CS0234: The type or namespace name 'Net' does not exist in the namesp
ace 'Alpha.System' (are you missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\_Imports_razor.g.cs(8,18): error CS0234: The type or namespace name 'Collections' does not exist in the namespace 'Alpha.System' (are you m
issing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\_Imports_razor.g.cs(9,18): error CS0234: The type or namespace name 'Linq' does not exist in the namespace 'Alpha.System' (are you missing
an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\_Imports_razor.g.cs(10,18): error CS0234: The type or namespace name 'Threading' does not exist in the namespace 'Alpha.System' (are you mi
ssing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\_Imports.razor(1,14): error CS0234: The type or namespace name 'Net' does not exist in the namesp
ace 'Alpha.System' (are you missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Shared_SurveyPrompt_razor.g.cs(8,18): error CS0234: The type or namespace name 'Collections' does not exist in the namespace 'Alpha.System'
 (are you missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Shared_SurveyPrompt_razor.g.cs(9,18): error CS0234: The type or namespace name 'Linq' does not exist in the namespace 'Alpha.System' (are y
ou missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Shared_SurveyPrompt_razor.g.cs(10,18): error CS0234: The type or namespace name 'Threading' does not exist in the namespace 'Alpha.System'
(are you missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\_Imports.razor(1,14): error CS0234: The type or namespace name 'Net' does not exist in the namesp
ace 'Alpha.System' (are you missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Shared_MainLayout_razor.g.cs(8,18): error CS0234: The type or namespace name 'Collections' does not exist in the namespace 'Alpha.System' (
are you missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Shared_MainLayout_razor.g.cs(9,18): error CS0234: The type or namespace name 'Linq' does not exist in the namespace 'Alpha.System' (are you
 missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Shared_MainLayout_razor.g.cs(10,18): error CS0234: The type or namespace name 'Threading' does not exist in the namespace 'Alpha.System' (a
re you missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\_Imports.razor(1,14): error CS0234: The type or namespace name 'Net' does not exist in the namesp
ace 'Alpha.System' (are you missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Shared_NavMenu_razor.g.cs(8,18): error CS0234: The type or namespace name 'Collections' does not exist in the namespace 'Alpha.System' (are
 you missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Shared_NavMenu_razor.g.cs(9,18): error CS0234: The type or namespace name 'Linq' does not exist in the namespace 'Alpha.System' (are you mi
ssing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Shared_NavMenu_razor.g.cs(10,18): error CS0234: The type or namespace name 'Threading' does not exist in the namespace 'Alpha.System' (are
you missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\_Imports.razor(1,14): error CS0234: The type or namespace name 'Net' does not exist in the namesp
ace 'Alpha.System' (are you missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Pages_Counter_razor.g.cs(8,18): error CS0234: The type or namespace name 'Collections' does not exist in the namespace 'Alpha.System' (are
you missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Pages_Counter_razor.g.cs(9,18): error CS0234: The type or namespace name 'Linq' does not exist in the namespace 'Alpha.System' (are you mis
sing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Pages_Counter_razor.g.cs(10,18): error CS0234: The type or namespace name 'Threading' does not exist in the namespace 'Alpha.System' (are y
ou missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\_Imports.razor(1,14): error CS0234: The type or namespace name 'Net' does not exist in the namesp
ace 'Alpha.System' (are you missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Pages_FetchData_razor.g.cs(8,18): error CS0234: The type or namespace name 'Collections' does not exist in the namespace 'Alpha.System' (ar
e you missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Pages_FetchData_razor.g.cs(9,18): error CS0234: The type or namespace name 'Linq' does not exist in the namespace 'Alpha.System' (are you m
issing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Pages_FetchData_razor.g.cs(10,18): error CS0234: The type or namespace name 'Threading' does not exist in the namespace 'Alpha.System' (are
 you missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\_Imports.razor(1,14): error CS0234: The type or namespace name 'Net' does not exist in the namesp
ace 'Alpha.System' (are you missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Pages_Index_razor.g.cs(8,18): error CS0234: The type or namespace name 'Collections' does not exist in the namespace 'Alpha.System' (are yo
u missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Pages_Index_razor.g.cs(9,18): error CS0234: The type or namespace name 'Linq' does not exist in the namespace 'Alpha.System' (are you missi
ng an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Pages_Index_razor.g.cs(10,18): error CS0234: The type or namespace name 'Threading' does not exist in the namespace 'Alpha.System' (are you
 missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\_Imports.razor(1,14): error CS0234: The type or namespace name 'Net' does not exist in the namesp
ace 'Alpha.System' (are you missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Pages__Host_cshtml.g.cs(9,18): error CS0234: The type or namespace name 'Collections' does not exist in the namespace 'Alpha.System' (are y
ou missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Pages__Host_cshtml.g.cs(10,18): error CS0234: The type or namespace name 'Linq' does not exist in the namespace 'Alpha.System' (are you mis
sing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
C:\Users\mmm\source\repos\Alpha.System.Charlie2\Microsoft.NET.Sdk.Razor.SourceGenerators\Microsoft.NET.Sdk.Razor.SourceGenerators.RazorSourceGene
rator\Pages__Host_cshtml.g.cs(11,18): error CS0234: The type or namespace name 'Threading' does not exist in the namespace 'Alpha.System' (are yo
u missing an assembly reference?) [C:\Users\mmm\source\repos\Alpha.System.Charlie2\Alpha.System.Charlie2.csproj]
    0 Warning(s)
    35 Error(s)

So maybe we're still missing some global:: in the code-gen?