stride3d/stride · error · InvalidOperationException

The name of a project cannot be set

Error message

The name of a project cannot be set

What it means

ProjectViewModel exposes the project name as read-only by reflecting SolutionProject.Name. The Name setter throws InvalidOperationException whenever a different value is assigned, because a project's name cannot be changed through this view model. This enforces the invariant that project identity is managed by the solution, not the view model.

Solutions

1. Do not attempt to rename projects via ProjectViewModel.Name; use the solution-level rename API for projects.
2. Make the UI mark project names as read-only so the setter is never invoked.
3. Check the item type before binding a rename command (only allow renaming non-project items).
4. Remove the setter call from serialization/import code paths that iterate all properties.

Example fix

// before
viewModel.Name = newName; // throws for projects
// after
if (viewModel is ProjectViewModel)
    throw new NotSupportedException("Rename projects via the solution, not ProjectViewModel");
viewModel.Name = newName;

if (viewModel is ProjectViewModel)
    throw new NotSupportedException("Projects cannot be renamed via ProjectViewModel");

bool isProject = item is ProjectViewModel;

try { vm.Name = newName; }
catch (InvalidOperationException) { /* read-only: use solution rename API */ }

When it happens

Trigger: Assigning any string other than the current Name to ProjectViewModel.Name, e.g. through data binding, a rename UI, or serialization code writing back properties.

Common situations: A generic property-grid or rename dialog tries to rename every item in the solution tree including projects; two-way WPF binding writes back the same-looking name with different casing/whitespace.

Understand the failure class

Background: UnsupportedOperationException and "is not supported" errors: when a library deliberately refuses a call — this error's family across 30 libraries.

Related errors

• Cannot change the name of a EntityHierarchyRootViewModel…
• Invoking ShouldStayOpen before the work is finished.
• Parent cannot be null
• The entity to insert has already been destroyed
• The folder being deleted is not empty.

AI-assisted analysis of stride3d/stride@96fad776d2 (2026-09-14). Data as JSON: /api/errors/6f695b88fb5f7dc5. Report an issue: GitHub.

Appendix: source

Thrown at sources/editor/Stride.Core.Assets.Editor/ViewModel/ProjectViewModel.cs:57

        }
    }

    // TODO: For the moment we consider that a project has only a single parent profile. Sharing project in several profile is not supported.
    public class ProjectViewModel : PackageViewModel
    {
        private bool isCurrentProject;

        public ProjectViewModel(SessionViewModel session, SolutionProject project, bool packageAlreadyInSession)
            : base(session, project, packageAlreadyInSession)
        {
            content.Add(Code = new ProjectCodeViewModel(this));
        }

        public SolutionProject Project => (SolutionProject)PackageContainer;

        public ProjectCodeViewModel Code { get; }

        public override string Name { get { return Project.Name; } set { if (value != Name) throw new InvalidOperationException("The name of a project cannot be set"); } }

        public UFile ProjectPath => Project.FullPath;

        // TODO CSPROJ=XKPKG
        public ProjectType Type => Project.Type;

        public PlatformType Platform => Project.Platform;

        /// <summary>
        /// Gets the generic type (either PlatformType or ProjectType)
        /// </summary>
        /// TODO: Remove this code as this is an ugly workaround
        public object GenericType => Platform != PlatformType.Shared ? (object)Platform : Type;

        public bool IsCurrentProject
        {
            get { return isCurrentProject; }
            internal set

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