using System;
public class Example
{virtual private int X;
private int Y;
static void Main(string[] args)
{Console.WriteLine("Hello World");
}
}

1. Hello World

2. HelloWorld

3. Syntax Error

4. Runtime Exception

 using System ;
public class Example
{
virtual private int X ;
private int Y ;
static void Main ( string [ ] args )
{
Console . WriteLine ( " Hello World " ) ;
}
}

1. 你好，世界

2. 你好，世界

3. 语法错误

4. 运行时异常

using System;
public class Example
{private int X;
private int Y;
Example()
{this.X = 1;
this.Y = 2;
}
static void Main(string[] args)
{Example Ob = new Example();
Console.WriteLine("{0}, {1}", Ob.X, Ob.Y);
}
}

1. 1, 2

2. 12

3. Syntax Error

4. Runtime Exception

1. 一二

2. 12

3. 语法错误

4. 运行时异常

using System;
public class Example
{private int X;
private int Y;
public Example()
{this.X = 1;
this.Y = 2;
}
public static ShowData()
{Console.WriteLine("{0}, {1}", this.X, this.Y);
}
static void Main(string[] args)
{Example Ob = new Example();
Ob.Show();
}
}

1. 1, 2

2. 12

3. Syntax Error

4. Runtime Exception

 using System ;
public class Example
{
private int X ;
private int Y ;
public Example ( )
{
this . X = 1 ;
this . Y = 2 ;
}
public static ShowData ( )
{
Console . WriteLine ( " {0}, {1} " , this . X , this . Y ) ;
}
static void Main ( string [ ] args )
{
Example Ob = new Example ( ) ;
Ob . Show ( ) ;
}
}

1. 一二

2. 12

3. 语法错误

4. 运行时异常

using System;
public class Example
{public Example Method1()
{Console.Write("####, ");
return this;
}
public Example Method2()
{Console.Write("@@@@, ");
return this;
}
public Example Method3()
{Console.Write("$$$$, ");
return this;
}
static void Main(string[] args)
{Example Ob = new Example();
Ob.Method1().Method2().Method3();
}
}

1. ####, @@@@, $$$$,

2. $$$$, @@@@, ####,

3. Syntax Error

4. Runtime Exception

1. ####，@@@@，$$$$，

2. $$$$，@@@@，####，

3. 语法错误

4. 运行时异常

using System;
public class Example
{public void SayHello()
{Console.Write("Hello World");
}
static void Main(string[] args)
{this.Method();
}
}

1. Hello World

2. Hello world

3. Syntax Error

4. Runtime Exception

 using System ;
public class Example
{
public void SayHello ( )
{
Console . Write ( " Hello World " ) ;
}
static void Main ( string [ ] args )
{
this . Method ( ) ;
}
}

1. 你好，世界

2. 你好，世界

3. 语法错误

4. 运行时异常