Nesting groups without index pages could lead to 'Collection was modified' exception. #37
Description
A set of nested groups will lead to an exception:
Exception: System.InvalidOperationException
Description: Collection was modified; enumeration operation may not execute.
Stack-trace:
at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
at System.Collections.Generic.List`1.Enumerator.MoveNextRare()
at System.Collections.Generic.List`1.Enumerator.MoveNext()
at Docnet.NavigationLevel.GenerateOutput(Config activeConfig, NavigatedPath activePath) in C:\Myprojects\VS.NET Proje
cts\Github\FransBouma\DocNet\src\DocNet\NavigationLevel.cs:line 93
at Docnet.NavigationLevel.GenerateOutput(Config activeConfig, NavigatedPath activePath) in C:\Myprojects\VS.NET Proje
cts\Github\FransBouma\DocNet\src\DocNet\NavigationLevel.cs:line 95
at Docnet.NavigationLevel.GenerateOutput(Config activeConfig, NavigatedPath activePath) in C:\Myprojects\VS.NET Proje
cts\Github\FransBouma\DocNet\src\DocNet\NavigationLevel.cs:line 95
at Docnet.Engine.GeneratePages() in C:\Myprojects\VS.NET Projects\Github\FransBouma\DocNet\src\DocNet\Engine.cs:line
98
at Docnet.Engine.DoWork() in C:\Myprojects\VS.NET Projects\Github\FransBouma\DocNet\src\DocNet\Engine.cs:line 47
at Docnet.Program.Main(String[] args) in C:\Myprojects\VS.NET Projects\Github\FransBouma\DocNet\src\DocNet\Program.cs
:line 53
Inner exception:
<null>
because the engine will create an index page for the group, but by doing that is changing the set of elements of the group (to add the index). This doesn't always succeed, as sometimes it can lead to the exception above.