diff --git a/Assets/StandaloneFileBrowser/Sample/CanvasSampleOpenFileImage.cs b/Assets/StandaloneFileBrowser/Sample/CanvasSampleOpenFileImage.cs
index 4fb1351..e335822 100644
--- a/Assets/StandaloneFileBrowser/Sample/CanvasSampleOpenFileImage.cs
+++ b/Assets/StandaloneFileBrowser/Sample/CanvasSampleOpenFileImage.cs
@@ -32,11 +32,13 @@ public class CanvasSampleOpenFileImage : MonoBehaviour, IPointerDownHandler {
     //
     public void OnPointerDown(PointerEventData eventData) { }
 
+    [System.Obsolete]
     void Start() {
         var button = GetComponent<Button>();
         button.onClick.AddListener(OnClick);
     }
 
+    [System.Obsolete]
     private void OnClick() {
         var paths = StandaloneFileBrowser.OpenFilePanel("Title", "", ".png", false);
         if (paths.Length > 0) {
@@ -45,6 +47,7 @@ public class CanvasSampleOpenFileImage : MonoBehaviour, IPointerDownHandler {
     }
 #endif
 
+    [System.Obsolete]
     private IEnumerator OutputRoutine(string url) {
         var loader = new WWW(url);
         yield return loader;
diff --git a/Assets/StandaloneFileBrowser/Sample/CanvasSampleOpenFileText.cs b/Assets/StandaloneFileBrowser/Sample/CanvasSampleOpenFileText.cs
index 39cb2f4..9f9d350 100644
--- a/Assets/StandaloneFileBrowser/Sample/CanvasSampleOpenFileText.cs
+++ b/Assets/StandaloneFileBrowser/Sample/CanvasSampleOpenFileText.cs
@@ -32,11 +32,13 @@ public class CanvasSampleOpenFileText : MonoBehaviour, IPointerDownHandler {
     //
     public void OnPointerDown(PointerEventData eventData) { }
 
+    [System.Obsolete]
     void Start() {
         var button = GetComponent<Button>();
         button.onClick.AddListener(OnClick);
     }
 
+    [System.Obsolete]
     private void OnClick() {
         var paths = StandaloneFileBrowser.OpenFilePanel("Title", "", "txt", false);
         if (paths.Length > 0) {
@@ -45,6 +47,7 @@ public class CanvasSampleOpenFileText : MonoBehaviour, IPointerDownHandler {
     }
 #endif
 
+    [System.Obsolete]
     private IEnumerator OutputRoutine(string url) {
         var loader = new WWW(url);
         yield return loader;
diff --git a/Assets/StandaloneFileBrowser/Sample/CanvasSampleOpenFileTextMultiple.cs b/Assets/StandaloneFileBrowser/Sample/CanvasSampleOpenFileTextMultiple.cs
index 61b35b2..39d6451 100644
--- a/Assets/StandaloneFileBrowser/Sample/CanvasSampleOpenFileTextMultiple.cs
+++ b/Assets/StandaloneFileBrowser/Sample/CanvasSampleOpenFileTextMultiple.cs
@@ -32,11 +32,13 @@ public class CanvasSampleOpenFileTextMultiple : MonoBehaviour, IPointerDownHandl
     //
     public void OnPointerDown(PointerEventData eventData) { }
 
+    [System.Obsolete]
     void Start() {
         var button = GetComponent<Button>();
         button.onClick.AddListener(OnClick);
     }
 
+    [System.Obsolete]
     private void OnClick() {
         // var paths = StandaloneFileBrowser.OpenFilePanel("Title", "", "txt", true);
         var paths = StandaloneFileBrowser.OpenFilePanel("Open File", "", "", true);
@@ -50,6 +52,7 @@ public class CanvasSampleOpenFileTextMultiple : MonoBehaviour, IPointerDownHandl
     }
 #endif
 
+    [System.Obsolete]
     private IEnumerator OutputRoutine(string[] urlArr) {
         var outputText = "";
         for (int i = 0; i < urlArr.Length; i++) {