codingseb
diff --git a/‎RegexDialog/Behaviors/SimplePropertyBindingBehavior.cs
Lines changed: 1 addition & 1 deletion b/‎RegexDialog/Behaviors/SimplePropertyBindingBehavior.cs
Lines changed: 1 addition & 1 deletion
@@ -8,7 +8,7 @@ public class SimplePropertyBindingBehavior : Behavior<DependencyObject>
     {
         private readonly ExpressionEvaluator expressionEvaluator = new ExpressionEvaluator();
         private string oldEventName = string.Empty;
-        private EventHandler<EventArgs> eventHandler;
+        private readonly EventHandler<EventArgs> eventHandler;
 
         public SimplePropertyBindingBehavior()
         {
Original file line number	Diff line number	Diff line change
`@@ -8,7 +8,7 @@ public class SimplePropertyBindingBehavior : Behavior<DependencyObject>`
`8`	`8`	`{`
`9`	`9`	`private readonly ExpressionEvaluator expressionEvaluator = new ExpressionEvaluator();`
`10`	`10`	`private string oldEventName = string.Empty;`
`11`		`- private EventHandler<EventArgs> eventHandler;`
	`11`	`+ private readonly EventHandler<EventArgs> eventHandler;`
`12`	`12`
`13`	`13`	`public SimplePropertyBindingBehavior()`
`14`	`14`	`{`