Create upper and lowercase versions of a string : String Case : String C# Examples

    
using  System;    
    
class  MainClass  {      
    public  static  void  Main()  {      
        string  str1  =  "ABCDEabcde1234567890";      
        
        string  strLow  =  str1.ToLower();  
        string  strUp  =    str1.ToUpper();  
        Console.WriteLine("Lowercase  version  of  str1:\n  "  +    strLow);  
        Console.WriteLine("Uppercase  version  of  str1:\n  "  +    strUp);  
    }
}