Evaluate Expressions in Switch Statements in C#

Question

I have to implement the following in a switch statement:

switch(num)
{
  case 4:
    // some code ;
    break;
  case 3:
    // some code ;
    brea         


        

Answer 1

The other way around would be possible also (relating to Jon Skeet's answer):

switch(num)
{
  case a:
      break;
  default:
      if( num < 0 )
      {}
   break;
}