Create DemoComponent.cs

project_name/DemoComponent.cs

@@ -0,0 +1,34 @@
+using ImGuiNET;
+using Nez;
+using Nez.ImGuiTools;
+
+namespace project_name
+{
+    public class DemoComponent : Component
+    {
+        int _buttonClickCounter;
+
+        public override void onAddedToEntity()
+        {
+            // register with the ImGuiMangaer letting it know we want to render some IMGUI
+            Core.getGlobalManager<ImGuiManager>().registerDrawCommand(imGuiDraw);
+        }
+
+        public override void onRemovedFromEntity()
+        {
+            // remove ourselves when we are removed from the Scene
+            Core.getGlobalManager<ImGuiManager>().unregisterDrawCommand(imGuiDraw);
+        }
+
+        void imGuiDraw()
+        {
+            // do your actual drawing here
+            ImGui.Begin("Your ImGui Window", ImGuiWindowFlags.AlwaysAutoResize);            
+            ImGui.Text("This is being drawn in DemoComponent");
+            if(ImGui.Button($"Clicked me {_buttonClickCounter} times"))
+                _buttonClickCounter++;
+            ImGui.End();
+        }
+
+    }
+}