diff --git a/SHADE_CSharp/src/Events/CallbackEvent.cs b/SHADE_CSharp/src/Events/CallbackEvent.cs
index 2c3cc388..44209288 100644
--- a/SHADE_CSharp/src/Events/CallbackEvent.cs
+++ b/SHADE_CSharp/src/Events/CallbackEvent.cs
@@ -117,10 +117,11 @@ namespace SHADE
         /// </summary>
         public void Invoke()
         {
-            foreach (CallbackAction action in actions)
+            for (int i = 0; i < actions.Count; ++i)
             {
                 try
                 {
+                    var action = actions[i] as CallbackAction;
                     action.Invoke();
                 }
                 catch (Exception e)
@@ -203,10 +204,11 @@ namespace SHADE
         /// </summary>
         public void Invoke(T1 t1)
         {
-            foreach (CallbackAction<T1> action in actions)
+            for (int i = 0; i < actions.Count; ++i)
             {
                 try
                 {
+                    var action = actions[i] as CallbackAction<T1>;
                     action.Invoke(t1);
                 }
                 catch (Exception e)
@@ -289,10 +291,11 @@ namespace SHADE
         /// </summary>
         public void Invoke(T1 t1, T2 t2)
         {
-            foreach (CallbackAction<T1, T2> action in actions)
+            for (int i = 0; i < actions.Count; ++i)
             {
                 try
                 {
+                    var action = actions[i] as CallbackAction<T1, T2>;
                     action.Invoke(t1, t2);
                 }
                 catch (Exception e)
@@ -375,10 +378,11 @@ namespace SHADE
         /// </summary>
         public void Invoke(T1 t1, T2 t2, T3 t3)
         {
-            foreach (CallbackAction<T1, T2, T3> action in actions)
+            for (int i = 0; i < actions.Count; ++i)
             {
                 try
                 {
+                    var action = actions[i] as CallbackAction<T1, T2, T3>;
                     action.Invoke(t1, t2, t3);
                 }
                 catch (Exception e)
@@ -461,10 +465,11 @@ namespace SHADE
         /// </summary>
         public void Invoke(T1 t1, T2 t2, T3 t3, T4 t4)
         {
-            foreach (CallbackAction<T1, T2, T3, T4> action in actions)
+            for (int i = 0; i < actions.Count; ++i)
             {
                 try
                 {
+                    var action = actions[i] as CallbackAction<T1, T2, T3, T4>;
                     action.Invoke(t1, t2, t3, t4);
                 }
                 catch (Exception e)
@@ -547,10 +552,11 @@ namespace SHADE
         /// </summary>
         public void Invoke(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5)
         {
-            foreach (CallbackAction<T1, T2, T3, T4, T5> action in actions)
+            for (int i = 0; i < actions.Count; ++i)
             {
                 try
                 {
+                    var action = actions[i] as CallbackAction<T1, T2, T3, T4, T5>;
                     action.Invoke(t1, t2, t3, t4, t5);
                 }
                 catch (Exception e)
@@ -633,10 +639,11 @@ namespace SHADE
         /// </summary>
         public void Invoke(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6)
         {
-            foreach (CallbackAction<T1, T2, T3, T4, T5, T6> action in actions)
+            for (int i = 0; i < actions.Count; ++i)
             {
                 try
                 {
+                    var action = actions[i] as CallbackAction<T1, T2, T3, T4, T5, T6>;
                     action.Invoke(t1, t2, t3, t4, t5, t6);
                 }
                 catch (Exception e)
@@ -719,10 +726,11 @@ namespace SHADE
         /// </summary>
         public void Invoke(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7)
         {
-            foreach (CallbackAction<T1, T2, T3, T4, T5, T6, T7> action in actions)
+            for (int i = 0; i < actions.Count; ++i)
             {
                 try
                 {
+                    var action = actions[i] as CallbackAction<T1, T2, T3, T4, T5, T6, T7>;
                     action.Invoke(t1, t2, t3, t4, t5, t6, t7);
                 }
                 catch (Exception e)
@@ -805,10 +813,11 @@ namespace SHADE
         /// </summary>
         public void Invoke(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8)
         {
-            foreach (CallbackAction<T1, T2, T3, T4, T5, T6, T7, T8> action in actions)
+            for (int i = 0; i < actions.Count; ++i)
             {
                 try
                 {
+                    var action = actions[i] as CallbackAction<T1, T2, T3, T4, T5, T6, T7, T8>;
                     action.Invoke(t1, t2, t3, t4, t5, t6, t7, t8);
                 }
                 catch (Exception e)
@@ -891,10 +900,11 @@ namespace SHADE
         /// </summary>
         public void Invoke(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8, T9 t9)
         {
-            foreach (CallbackAction<T1, T2, T3, T4, T5, T6, T7, T8, T9> action in actions)
+            for (int i = 0; i < actions.Count; ++i)
             {
                 try
                 {
+                    var action = actions[i] as CallbackAction<T1, T2, T3, T4, T5, T6, T7, T8, T9>;
                     action.Invoke(t1, t2, t3, t4, t5, t6, t7, t8, t9);
                 }
                 catch (Exception e)
@@ -977,10 +987,11 @@ namespace SHADE
         /// </summary>
         public void Invoke(T1 t1, T2 t2, T3 t3, T4 t4, T5 t5, T6 t6, T7 t7, T8 t8, T9 t9, T10 t10)
         {
-            foreach (CallbackAction<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> action in actions)
+            for (int i = 0; i < actions.Count; ++i)
             {
                 try
                 {
+                    var action = actions[i] as CallbackAction<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>;
                     action.Invoke(t1, t2, t3, t4, t5, t6, t7, t8, t9, t10);
                 }
                 catch (Exception e)
diff --git a/SHADE_CSharp/src/Events/CallbackEvent.tt b/SHADE_CSharp/src/Events/CallbackEvent.tt
index 66a8b6d9..8d903d0f 100644
--- a/SHADE_CSharp/src/Events/CallbackEvent.tt
+++ b/SHADE_CSharp/src/Events/CallbackEvent.tt
@@ -134,10 +134,11 @@ namespace SHADE
         /// </summary>
         public void Invoke(<# if (i != 0) { for (int t = 1; t < i + 1; ++t) { #>T<#=t#> t<#=t#><# if (t != i) { #>, <# } #><# } } #>)
         {
-            foreach (CallbackAction<# if (i != 0) { #><<# for (int t = 1; t < i + 1; ++t) { #>T<#=t#><# if (t != i) { #>, <# } #><# } #>><# } #> action in actions)
+            for (int i = 0; i < actions.Count; ++i)
             {
                 try
                 {
+                    var action = actions[i] as CallbackAction<# if (i != 0) { #><<# for (int t = 1; t < i + 1; ++t) { #>T<#=t#><# if (t != i) { #>, <# } #><# } #>><# } #>;
                     action.Invoke(<# for (int t = 1; t < i + 1; ++t) { #>t<#=t#><# if (t != i) { #>, <# } #><# } #>);
                 }
                 catch (Exception e)