Question about (case) in coding NPCDialog!

Hello,
What case means?? and how do I know the exact number of case I should type?
For example, for Barber NPC, it's:
#region Barber
case 10002:
{
if (Control == 0)
{
GC.AddSend(Packets.NPCSay("Would you like to change your hairstyle? I can offer you a change for 500 silvers. You can choose from the styles below."));

Why case here is (10002)??!! I thought the case number should be the NPC ID, please any help, so I can write the case for the NPC I add.

The case mean the npc id you
can change it

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And yes.. the switch id is the id of the npc ID in this case.

I have added a new NPC and made a code for him by editing it in NPCDialog in
rikardo updated>PacketHandling>NPCDialog but the NPC still tells me I am a blank npc I still don't talk anything useful my ID is 1270, I also edited an already existed NPC Dialog which is (Barber) in TwinCity, I edited it and then saved the changes and logged in my server but she still say the old message although I changed it, here is the example:-

#region Barber
case 10002:
{
if (Control == 0)
{
GC.AddSend(Packets.NPCSay("Would you like to change your hairstyle? I can offer you a change for 500 silvers. You can choose from the styles below."));
GC.AddSend(Packets.NPCLink("New Styles", 1));
GC.AddSend(Packets.NPCLink("Nostalgic Styles", 2));
GC.AddSend(Packets.NPCLink("Special Styles", 3));
GC.AddSend(Packets.NPCLink("No thanks.", 255));
GC.AddSend(Packets.NPCSetFace(N.Avatar));
GC.AddSend(Packets.NPCFinish());
GC.Paid = false;

And I changed the message which is in:
GC.AddSend(Packets.NPCSay("Would you like to change your hairstyle? I can offer you a change for 500 silvers. You can choose from the styles below."));

I made it:
GC.AddSend(Packets.NPCSay("What do you want?"));
and saved the changes and when I logged into the server she still says:-

Would you like to change your hairstyle? I can offer you a change for 500 silvers. You can choose from the styles below.

Anyone can say, why the hell the changes can't be modified into the server?
Am I doing something wrong or I missed anything?? Should I modify any file else than the NPCDialog.c3

Did you build or debug in C#?

No, I only modified the NPCDialog.c3 file by opening it as a Notepad..
Should I build or debug the NPCDialog file in the C# after editing it in the Notepad??

You should do all of your modifications through Visual Studio/C# Express, never in notepad. And then you should build your project using F6 if you just wish to build, F5 if you wish to perform some debugging.

OK, I changed it and opened it in Visual C# Express and then pressed F6 (Build Solution)
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And in the server she still says her old message:-
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Why it can't be changed in the game?!!

Because after building it your then running the wrong .exe :facepalm:

ohh then what .exe should I run?

If you hit F6 your building the release version, which is the version you should be using to run the server.

If you hit F5 your building the debug version, which is not the version you should be using to run the server as its built specifically for debugging.

So the release version.

So, what .exe should I run?

So...use your brain, goto the folder where your source is, then goto the bin folder, and then see if you can figure it out from there.

Is there any video guide about adding NPCs to the server, so I can download to easily understand?