title: this.Touch - Event firing multiple times, don't know how to unsubscribe
body: <p>This problem should be fairly simple (I think), but I don't know how to do it correctly. I am still very new to programming.</p>
  
  <p>I have a simple class that inherits from EditText. There are 2 problems:</p>
  
  <ol>
  <li>Initially, the Touch event fires 3 times, the second touch will fire the event 5 times and so on. What is going on here?</li>
  <li>I don't know how to unsubscribe the event, or a at what stage. Normally, when working with an activity, I simply subscribe during OnResume and unsubscribe during OnPause. What is the right solution in this case? Should I write a custom method and call that from a parent class? Should I implement IDisposable or something similar? Should I write the class in a different way?</li>
  </ol>
  
  <p>This is my custom edit text demo class:</p>
  
  <pre><code>    namespace HelloWorld_Android {
          class DemoEditText : EditText {
              public DemoEditText (Context context, IAttributeSet attrs) : base(context, attrs) {
                  this.Touch += HandleTouch;
              }
  
              void HandleTouch (object sender, TouchEventArgs e) {
                  Console.WriteLine ("Fired");
              }
          }
      }
  </code></pre>
  
  <p>The activity:</p>
  
  <pre><code>    namespace HelloWorld_Android {
          [Activity (Label = "HelloWorld_Android", MainLauncher = true)]
          public class MainActivity : Activity {
              protected override void OnCreate (Bundle bundle) {
                  base.OnCreate (bundle);
                  SetContentView(Resource.Layout.Main);
              }
          }
      }
  </code></pre>
  
  <p>My XML:</p>
  
  <pre><code>    &lt;?xml version="1.0" encoding="utf-8"?&gt;
      &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
          android:orientation="vertical"
          android:layout_width="fill_parent"
          android:layout_height="fill_parent"&gt;
  
          &lt;HelloWorld_Android.DemoEditText
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:id="@+id/test"
           /&gt;
      &lt;/LinearLayout&gt;
  </code></pre>