修改命名空间

ShrlAlgoToolkit.RevitCore/Assists/OnProjectDocument.cs

@@ -0,0 +1,18 @@
+using Autodesk.Revit.DB;
+using Autodesk.Revit.UI;
+
+namespace ShrlAlgoToolkit.RevitCore.Assists;
+
+/// <summary>
+/// 项目文档可用
+/// </summary>
+public class OnProjectDocument : IExternalCommandAvailability
+{
+    public bool IsCommandAvailable(UIApplication applicationData, CategorySet selectedCategories)
+    {
+        var doc = applicationData?.ActiveUIDocument?.Document;
+        if (doc != null) { return !doc.IsFamilyDocument; }
+        return false;
+        
+    }
+}