Switch Case Causing Trouble In Going To A particular Function

$("#option1, #option2").change(function(e) {
    var option1 = $('#option1').val();
    var option2 = $('#option2').val();
    switch (option1) {
        case 1:
            switch (option2) {
                case 'A':
                    alert('For case 1 Only');
                    break;
            }
            break;
        case 2:
            break;
        default:
            // code to be executed if n is different from case 1 and 2
    }
});

switch (tag) {
    case 1: { // curly braces
        // ...
        break;
    }
    case 2: {  // curly braces
        // ...
        break;
    }
    case 3: {  // curly braces
        // ...
        break;
    }
}

private void Next_Click(object sender, EventArgs e)
{            
    switch (i++ % 4)
    {
        case 0:
            red.BackColor = Color.Red;
            orange.BackColor = Color.Black;
            green.BackColor = Color.Black;
            break;
        case 1:
            red.BackColor = Color.Red;
            oragne.BackColor = Color.Orange;
            green.BackColor = Color.Black;
            break;
        case 2:
            red.BackColor = Color.Black;
            orange.BackColor = Color.Black;
            green.BackColor = Color.Green;
            break;
        case 3:
            red.BackColor = Color.Black;
            orange.BackColor = Color.Orange;
            green.BackColor = Color.Black;
            break;
    }
}