Halo to all..  Im new in C#..
Pls. Do help.. I have a problem on creating an array of array.. I have dis settings 
comboport = 16 array; 
combochannel = 81 array; 
In 1 comboport there should be 81 combochannel. First i have to set da comboport into selected index, then select different channel. 
And in 1 channel there should be desired combosensor and combooutput used. 
first group. 
i have dis code.. Selecting da ComboChannel used 
private void comboIOChannel_SelectedIndexChanged(object sender, EventArgs e) 
{ 
IOChan = comboIOChannel.SelectedIndex; 
comboIOSensor.SelectedIndex = IOSensor[IOChan]; 
comboOutput.SelectedIndex = IOOutput[IOChan]; 
} 
Main group.... Selecting da comboport used. 
private void comboPortIO_SelectedIndexChanged(object sender, EventArgs e) 
{ 
IOPortNumber = comboPort.SelectedIndex; 
combochannel.selectedindex = IOChannelNo [IOPortNumber]; 
comboIOSensor.SelectedIndex = IOSensor[IOPortNumber]; 
comboOutput.SelectedIndex = IOOutput[IOPortNumber]; 
} 
Now da problem is eveytime i select da comboport, da combosensor and combooutput is not changing on da selected items.. 
please do help and take a look of my codes.. any ideas Please.. 
Thanks..