Errors importing C# solution (#1613)
Several errors and useless output when importing a C# solution:
1 - Attributes/methods marked with modifiers as "sealed", ... or definitions like "public static bool Any<T>" are NOT IMPORTED when using Reverse Engineering
2 - Project hierarchy (folders) is not respected, resulting on mixed diagrams from different projects
As a result, reverse engineering DOES NOT WORK for C# solutions. Please, fix.