下列哪个是 C# 中运行时常量的定义方法（） public static readonly int Port = 47896 public const int Port = 47896 public static const int Port = 47896 public static sealed int Port = 47896
public static readonly int Port = 47896
public const int Port = 47896
public static const int Port = 47896
public static sealed int Port = 47896
