using System;
public interface ILog {
int OpenLogFile(string fileName);
int CloseLogFile();
void LogString(string strToLog);
}
public class MyLog : ILog {
public int OpenLogFile(string fileName) {
Console.WriteLine("Opening File {0}", fileName);
return 0;
}
public int CloseLogFile() {
Console.WriteLine("Closing log file");
return 0;
}
public void LogString(string strToLog) {
Console.WriteLine("Logging String {0}", strToLog);
}
}
class MainClass {
public static void Main() {
MyLog app = new MyLog();
app.OpenLogFile("AFile");
app.LogString("Hello world");
app.CloseLogFile();
}
}