Make sure we use the right project in the updated project snapshot

This seems like the cause of https://github.com/dotnet/razor/issues/10865

src/Razor/src/Microsoft.CodeAnalysis.Remote.Razor/ProjectSystem/DocumentSnapshotFactory.cs

@@ -4,18 +4,16 @@
 using System;
 using System.Composition;
 using System.Runtime.CompilerServices;
-using Microsoft.CodeAnalysis.Razor.Workspaces;
 
 namespace Microsoft.CodeAnalysis.Remote.Razor.ProjectSystem;
 
 [Export(typeof(DocumentSnapshotFactory)), Shared]
 [method: ImportingConstructor]
-internal class DocumentSnapshotFactory(Lazy<ProjectSnapshotFactory> projectSnapshotFactory, IFilePathService filePathService)
+internal class DocumentSnapshotFactory(Lazy<ProjectSnapshotFactory> projectSnapshotFactory)
 {
     private static readonly ConditionalWeakTable<TextDocument, RemoteDocumentSnapshot> s_documentSnapshots = new();
 
     private readonly Lazy<ProjectSnapshotFactory> _projectSnapshotFactory = projectSnapshotFactory;
-    private readonly IFilePathService _filePathService = filePathService;
 
     public RemoteDocumentSnapshot GetOrCreate(TextDocument textDocument)
     {
@@ -23,8 +21,9 @@ internal class DocumentSnapshotFactory(Lazy<ProjectSnapshotFactory> projectSnaps
         {
             if (!s_documentSnapshots.TryGetValue(textDocument, out var documentSnapshot))
             {
-                var projectSnapshot = _projectSnapshotFactory.Value.GetOrCreate(textDocument.Project);
-                documentSnapshot = new RemoteDocumentSnapshot(textDocument, projectSnapshot, _filePathService);
+                var projectSnapshotFactory = _projectSnapshotFactory.Value;
+                var projectSnapshot = projectSnapshotFactory.GetOrCreate(textDocument.Project);
+                documentSnapshot = new RemoteDocumentSnapshot(textDocument, projectSnapshot, projectSnapshotFactory);
                 s_documentSnapshots.Add(textDocument, documentSnapshot);
             }
 

src/Razor/src/Microsoft.CodeAnalysis.Remote.Razor/ProjectSystem/RemoteDocumentSnapshot.cs

@@ -7,16 +7,15 @@ using System.Threading.Tasks;
 using Microsoft.AspNetCore.Razor;
 using Microsoft.AspNetCore.Razor.Language;
 using Microsoft.CodeAnalysis.Razor.ProjectSystem;
-using Microsoft.CodeAnalysis.Razor.Workspaces;
 using Microsoft.CodeAnalysis.Text;
 
 namespace Microsoft.CodeAnalysis.Remote.Razor.ProjectSystem;
 
-internal class RemoteDocumentSnapshot(TextDocument textDocument, RemoteProjectSnapshot projectSnapshot, IFilePathService filePathService) : IDocumentSnapshot
+internal class RemoteDocumentSnapshot(TextDocument textDocument, RemoteProjectSnapshot projectSnapshot, ProjectSnapshotFactory projectSnapshotFactory) : IDocumentSnapshot
 {
     private readonly TextDocument _textDocument = textDocument;
     private readonly RemoteProjectSnapshot _projectSnapshot = projectSnapshot;
-    private readonly IFilePathService _filePathService = filePathService;
+    private readonly ProjectSnapshotFactory _projectSnapshotFactory = projectSnapshotFactory;
 
     // TODO: Delete this field when the source generator is hooked up
     private Document? _generatedDocument;
@@ -63,8 +62,10 @@ internal class RemoteDocumentSnapshot(TextDocument textDocument, RemoteProjectSn
     {
         var id = _textDocument.Id;
         var newDocument = _textDocument.Project.Solution.WithAdditionalDocumentText(id, text).GetAdditionalDocument(id).AssumeNotNull();
+        var project = newDocument.Project;
+        var projectSnapshot = _projectSnapshotFactory.GetOrCreate(project);
 
-        return new RemoteDocumentSnapshot(newDocument, _projectSnapshot, _filePathService);
+        return new RemoteDocumentSnapshot(newDocument, projectSnapshot, _projectSnapshotFactory);
     }
 
     public bool TryGetGeneratedOutput([NotNullWhen(true)] out RazorCodeDocument? result)