protected override void OnCreate(Bundle savedInstanceState)
{
    Intent intent =Intent;
    String action = Intent.Action;
    String type = intent.Type;

    if (Intent.ActionSend.Equals(action) && type != null)
    {
        if ("text/plain".Equals(type))
        {
            // Handle text being sent
            // ...
            // ...
            // ...
            var mainintent = new Intent(this, typeof(MainActivity));
            StartActivity(mainintent);
        }
        else if (type.StartsWith("image/"))
        {
            // Handle single image being sent
            // ...
            // ...
            // ...
            var mainintent = new Intent(this, typeof(MainActivity));
            StartActivity(mainintent);
        }
    }
    else if (Intent.ActionSendMultiple.Equals(action) && type != null)
    {
        if (type.StartsWith("image/"))
        {
            // Handle multiple images being sent
            // ...
            // ...
            // ...
            var mainintent = new Intent(this, typeof(MainActivity));
            StartActivity(mainintent);
        }
    }
    else
    {
        // Handle other intents, such as being started from the home screen
    }
}