We have recent issue reported to our repo related to maui-blazor. Reported issue is: dotnet/templating#3666

I made some checks below:

1. I checked the templates and it appears that sln is not part of templates anymore. Could you please confirm?

2. Could you please check if sourceName you are using in templates is safe for default forms?
   https://github.com/dotnet/templating/wiki/Naming-and-default-value-forms
   Template engine applies 5 forms to the source name:

• identity - no transformation
• safe namespace

string workingValue = Regex.Replace(value, @"(^\s+|\s+$)", "");
workingValue = Regex.Replace(workingValue, @"(((?<=\.)|^)((?=\d)|\.)|[^\w\.])|(\.$)", "_");

• safe class name

string workingValue = Regex.Replace(value, @"(^\s+|\s+$)", "");
workingValue = Regex.Replace(workingValue, @"(((?<=\.)|^)(?=\d)|\W)", "_");

• lower safe namespace and lower safe class name (same as above + ToLowerInvariant)

The source name you chose in template.json should provide different results for the form above, similar to the name mentioned in https://github.com/dotnet/templating/wiki/Naming-and-default-value-forms:

When sourceName is used in namespaces and class names, corresponding form should be used instead.
If the sourceName chosen is not safe, i.e. forms transformation results in same result, it's not guaranteed that correct form will be used when template engine replaces the values. This happened for the issue above:

• MauiApp1 is same for identity, namespace, and class name forms
• user entered Maui-Blazor-Dash, which results in Maui-Blazor-Dash, Maui_Blazor_Dash, Maui_Blazor_Dash respectively
• template engine picked up one of latter 2 for all replacements: while it is correct for namespace, it is not correct for replacements made in solution files, where Maui-Blazor-Dash should have been used.

While some other templates have same issue in sourceName, usually it is ok to use it if sourceName is only used in namespace for replacement, however it is not that case for maui, as sourceName is not used only for namespaces.