C#

public class DoItUser
{
    public DoItUser()
    {
        MyClass myClass = new MyClass();
        myClass.MyEvent += new DoItDelegate(DoItFunction);
    }

    private void DoItFunction(int i)
    {
        // ...
    }
}

public delegate void DoItDelegate(int i);

public class MyClass
{
    private DoItDelegate myEvent;

    public event DoItDelegate MyEvent
    {
        add
        {
            myEvent += value;
            DoSomethingElse();
        }
        remove { myEvent -= value; }
    }

    private void DoSomethingElse()
    {
        // ...
    }
}

static void OnCallClick(String ^msg)
{
     CString nativeString = msg;
}

#if defined(__cplusplus_cli)

	template <class SystemString>
	CStringT( SystemString^ pString ) :
		CThisSimpleString( StringTraits::GetDefaultManager() )
	{
		cli::pin_ptr<const System::Char> pChar = PtrToStringChars( pString );
		const wchar_t *psz = pChar;
		*this = psz;
	}

public String[] Split(String alpha)
       {
           String str = alpha;
           List<String> returnVal = new List<String>();

           Regex regexp = new Regex("[0-9]+");
           MatchCollection matchColection = regexp.Matches(str);
           for (int i = 0; i < matchColection.Count; i++)
           {
               returnVal.Add(matchColection[i].Value);
           }

           return returnVal.ToArray();

       }