From 499377ce0c1f843c533d686941ee1f078917db9a Mon Sep 17 00:00:00 2001
From: Nino van der Mark <ninovdmark@gmail.com>
Date: Tue, 18 Jun 2024 12:43:52 +0200
Subject: [PATCH] Fixed possible null exception in ImGuiManager (#3)

---
 Generator/Test/EvergineImGUITest/Managers/ImGuiManager.cs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Generator/Test/EvergineImGUITest/Managers/ImGuiManager.cs b/Generator/Test/EvergineImGUITest/Managers/ImGuiManager.cs
index c9fca05..7462f21 100644
--- a/Generator/Test/EvergineImGUITest/Managers/ImGuiManager.cs
+++ b/Generator/Test/EvergineImGUITest/Managers/ImGuiManager.cs
@@ -104,7 +104,11 @@ protected override void OnDeactivated()
         {
             base.OnDeactivated();
 
-            var display = this.renderManager.ActiveCamera3D.Display;
+            var display = this.renderManager.ActiveCamera3D?.Display;
+            if ( display == null ) {
+                return;
+            }
+            
             display.DisplaySizeChanged -= this.Display_DisplaySizeChanged;
             display.DisplayFrameBufferChanged -= this.Display_DisplayFrameBufferChanged;
             this.renderManager.ActiveCamera3D.DrawContext.OnPostRender -= this.DrawContext_OnPostRender;