How to inherit from StreamReader

Question

Hi I want to write a class which inherits from StreamReader. However the compiler prevents me by saying StreamReader.StreamReader() is private. Could you tell me how to solve this? Thanks

Administrator · Answer

Thanks a lot!

Administrator · Answer

You are indeed able to extend the StreamReader class. For Example: using System; using System.IO; public class MyCustomReader: StreamReader { public MyCustomReader(string path): base(path) {} public string Text() { return Hello World; } static void Main() { MyCustomReader reader = new MyCustomReader(@d:\word.doc); Console.WriteLine(reader.Text()); } }

Administrator · Answer

I don't think you can inherit from the StreamReader class. I am pretty sure that it is a sealed class so you can only use it not from it. However having said that I also know that there is no parameter-less StreamReader contructor or function. You must provide at bare minimum a stream or a string.