diff --git a/src/CodeNav.OutOfProc/TextViewMarginProvider.cs b/src/CodeNav.OutOfProc/TextViewMarginProvider.cs
new file mode 100644
index 0000000..bfa4084
--- /dev/null
+++ b/src/CodeNav.OutOfProc/TextViewMarginProvider.cs
@@ -0,0 +1,34 @@
+using CodeNav.OutOfProc.Services;
+using CodeNav.OutOfProc.ToolWindows;
+using Microsoft.VisualStudio.Extensibility;
+using Microsoft.VisualStudio.Extensibility.Editor;
+using Microsoft.VisualStudio.RpcContracts.RemoteUI;
+
+namespace CodeNav.OutOfProc;
+
+[VisualStudioContribution]
+internal class TextViewMarginProvider(CodeDocumentService codeDocumentService) : ExtensionPart, ITextViewMarginProvider
+{
+    /// <inheritdoc />
+    public TextViewExtensionConfiguration TextViewExtensionConfiguration => new()
+    {
+        AppliesTo =
+        [
+            DocumentFilter.FromDocumentType("CSharp"),
+            DocumentFilter.FromGlobPattern("**/*.cs", true),
+        ],
+    };
+
+    /// <inheritdoc />
+    public TextViewMarginProviderConfiguration TextViewMarginProviderConfiguration =>
+        new(marginContainer: ContainerMarginPlacement.KnownValues.Left)
+        {
+            Before = [MarginPlacement.KnownValues.Glyph],
+        };
+
+    /// <inheritdoc />
+    public Task<IRemoteUserControl> CreateVisualElementAsync(ITextViewSnapshot textView, CancellationToken cancellationToken)
+    {
+        return Task.FromResult<IRemoteUserControl>(new CodeNavToolWindowControl(codeDocumentService.CodeDocumentViewModel));
+    }
+}
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