IO::StreamWriter^ stream;

try
{
stream = gcnew IO::StreamWriter("test.txt", true);
stream->WriteLine("This line appended to file!");
}

using namespace System;

int main()
{
IO::StreamWriter^ stream;

try
{
stream = gcnew IO::StreamWriter("test.txt", true);
stream->WriteLine("This line appended to file!");
}

catch(IO::DirectoryNotFoundException^ e) { Console::WriteLine("DNF"); }
catch(Security::SecurityException^ e) { Console::WriteLine("SE"); }
catch(IO::IOException^ e) { Console::WriteLine("IOE"); }
catch(Exception^ e) { Console::WriteLine("E"); }

finally { stream->Close(); }
}