public override void ChannelUp()
{
if (CurrentChannelIndex == (KnownChannels.Items.Count - 1))
{
Channel = KnownChannels.Items[0];
}
else if (CurrentChannelIndex > -1)
{
Channel = KnownChannels.Items[CurrentChannelIndex + 1];
}
else
{
Channel = KnownChannels.FindClosest(Channel);
}
}