Добавьте файлы проекта.

SQLVision.Visualizers/Interfaces/IVisualizer.cs

@@ -0,0 +1,12 @@
+using Microsoft.UI.Xaml;
+using SQLVision.Core.Enums;
+using SQLVision.Core.Models;
+using System.Data;
+
+namespace SQLVision.Visualizers.Interfaces;
+
+public interface IVisualizer
+{
+    FrameworkElement Visualize(DataTable data, OutputDefinition definition);
+    bool CanVisualize(OutputType type);
+}