The wise way to define a string class

Question

I wonder if you could tell me whether it is a wise way to declare a string class in C#:

 class Item 
    {  
        public string id = "";  
        public string name = "";  
        public string title = "";  
        public string value = "";  
        public string type = "";  
        public string tagname = ""; 
    }
 Their value is to be added in a program.