public IllegalOperationException(string msg) : base(msg){}

public IllegalOperationException(string msg) : base(msg){}
这句话的意思，是不是继承基类的构造方法？

C# code

    /// <summary>    /// 非法操作异常    /// </summary>    public class IllegalOperationException : Exception    {        public IllegalOperationException(string msg) : base(msg){}    }

[解决办法]
从派生类中访问基类的成员：
http://msdn.microsoft.com/zh-cn/library/hfw7t1ce.aspx