How to use HandlerValue? How to write to solution?

[kondr1]

I can't found documentation. I try to load .csproj file and add it to the new solution folder. So… How to add new solution folder and write list of projects to this folder?

[3F]

## 2.7+ ```csharp using Sln sln = new("input.sln", SlnItems.AllNoLoad); SolutionFolder[] folders = [ new("My Folder"), ]; var projects = sln.Result.ProjectItems.ForEach(p => { // all C# projects (legacy + Sdk-style) inside first folder^ if(p.IsCs()) { p.parent.Value = folders[0]; } }); LhDataHelper hdata = new(); hdata.SetProjects(projects).SetFolders(folders); using SlnWriter w = new("result.sln", hdata); await w.WriteAsync(sln.Result.Map); ``` ## 2.0+ ```csharp using Sln sln = new("input.sln", SlnItems.AllNoLoad); List<SolutionFolder> folders = new() { new SolutionFolder("My Folder"), }; var projects = sln.Result.ProjectItems.ForEach(p => { // all C# projects (legacy + Sdk-style) inside first folder^    if(p.IsCs()) { p.parent.Value = folders[0]; } }); using SlnWriter w = new("result.sln", new Dictionary<Type, HandlerValue>() { [typeof(LProjectSolutionItems)] = new(new WProjectSolutionItems(folders)),    [typeof(LNestedProjects)] = new(new WNestedProjects(folders, projects)), }); w.Write(sln.Result.Map); ``` Note, 2.6.x has a bug with a disappearing [`EndProject` line](993dcc9). Until [**2.7**](https://github.com/3F/MvsSln/releases/tag/2.7), keep configuring *LProject* handler if no changes like ~ ```csharp [typeof(LProject)] = new(new WProject(sln.Result.ProjectItems, sln.Result.ProjectDependencies)), ``` Prior to 2.7, you may also need to [prepare](#3 (comment)) your own skeleton for records that do not initially exist in the Map but are planned to be used.

[3F]

Updated example for 2.7. Why markdown syntax doesn't work on my edit o_o