using System;
namespace a
{
public abstract class Logger {
public abstract void Write (string s);
public virtual string GetVersion() {
return "LoggerBase 1.0";
}
}
abstract class NormalLogger : Logger {
public override void Write( string s){
Console.WriteLine(s);
}
public override string GetVersion() {
return "NormalLogger 1.0";
}
}
abstract class ColorLogger : Logger {
public override void Write( string s){
Console.WriteLine(s);
}
public override string GetVersion() {
Console.ForegroundColor = ConsoleColor.DarkBlue;
return "ColoredLogger 1.0";
}
}
class LoggerService {
}
class Program
{
public static void Main(string[] args)
{
Console.ReadKey();
}
}
}
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