C# Switch error

Hello,

So I’m adding MP to my game following a Unity tutorial, and I’m having a problem
with switch statements.
here’s the code:

void  TestConnection (){
 // Start/Poll the connection test, report the results in a label and react to the results accordingly
 natCapable = Network.TestConnection();
 switch (natCapable) {  
  case ConnectionTesterStatus.Error: 
   testMessage = "Problem determining NAT capabilities";
   doneTesting = true;
   break;
   
  case ConnectionTesterStatus.Undetermined: 
   testMessage = "Undetermined NAT capabilities";
   doneTesting = false;
   break;
   
  case ConnectionTesterStatus.PrivateIPNoNATPunchthrough: 
   testMessage = "Cannot do NAT punchthrough, filtering NAT enabled hosts for client connections,"
   +" local LAN games only.";
   filterNATHosts = true;
   Network.useNat = true;
   doneTesting = true;
   break;
   
  case ConnectionTesterStatus.PrivateIPHasNATPunchThrough:
   if (probingPublicIP)
    testMessage = "Non-connectable public IP address (port "+ serverPort +" blocked),"
    +" NAT punchthrough can circumvent the firewall.";
   else
    testMessage = "NAT punchthrough capable. Enabling NAT punchthrough functionality.";
   // NAT functionality is enabled in case a server is started,
   // clients should enable this based on if the host requires it
   Network.useNat = true;
   doneTesting = true;
   break;
   
  case ConnectionTesterStatus.PublicIPIsConnectable:
   testMessage = "Directly connectable public IP address.";
   Network.useNat = false;
   doneTesting = true;
   break;
   
  // This case is a bit special as we now need to check if we can 
  // use the blocking by using NAT punchthrough
  case ConnectionTesterStatus.PublicIPPortBlocked:
   testMessage = "Non-connectble public IP address (port " + serverPort +" blocked),"
   +" running a server is impossible.";
   Network.useNat = false;
   // If no NAT punchthrough test has been performed on this public IP, force a test
   if (!probingPublicIP)
   {
    Debug.Log("Testing if firewall can be circumnvented");
    natCapable = Network.TestConnectionNAT();
    probingPublicIP = true;
    timer = Time.time + 10;
   }
   // NAT punchthrough test was performed but we still get blocked
   else if (Time.time > timer)
   {
    probingPublicIP = false; // reset
    Network.useNat = true;
    doneTesting = true;
   }
   break;
  case ConnectionTesterStatus.PublicIPNoServerStarted:
   testMessage = "Public IP address but server not initialized,"
   +"it must be started to check server accessibility. Restart connection test when ready.";
   break;
  default: 
   testMessage = "Error in test routine, got " + natCapable;
  }
}

and from there I get this error:
“Control cannot fall through from one case label to another.”
Any help?

Add a break at the last(default) case:

default: 
    testMessage = "Error in test routine, got " + natCapable;
    break;