// Arguments in C# methods are optional.
// To elaborate, a Lua script can execute the below function
// with two arguments, despite the fact that there is only one
// C# argument. This is because we must check for the existance
// of the Lua arguments within this C# method. So if Lua
// executes this method without argument 1 of type string and
// argument 2 of type function, a Lua error is emitted to VM.
// If you choose to add arguments to a C# function, the GLua
// type marshals will attempt to cast the Lua arguments to
// its equivalent C# type. If a cast fails, the C# argument uses
// defaults.
private static void SecretPhrase()
{
int callback = -1;
Console.WriteLine("Finding the secret phrase...");
// This will freeze the server for five second because we aren't asynchronous
System.Threading.Thread.Sleep(5000);
// Push the callback function to the stack
Lua.Push(2);
// Push argument 1 to the stack
Lua.Push("rusty bullet hole");
// Create the Lua reference after all arguments are passed
callback = Lua.ReferenceCreate();
// Push our completed reference back to the stack
Lua.ReferencePush(callback);
// Call the callback function with our secret phrase as argument 1
Lua.Call(1, 0);
}