string author = "Mahesh Chand";   
 string bio = "Mahesh Chand is a founder of C# Corner.";   
    
 // Covert everything to uppercase   
 string ucaseAuthor = author.ToUpper();     
 Console.WriteLine($"Uppercase: {ucaseAuthor}");   
    
 // Covert everything to lowercase   
 string lcaseAuthor = author.ToLower();   
 Console.WriteLine($"Lowercase: {lcaseAuthor}");   
    
 // We can direct convert to uppercase or lowercase   
 Console.WriteLine(bio.ToLower());   
 Console.WriteLine(bio.ToUpper());  

  string Resault = string.Empty; 
  
             Console.Write("Give Me A String :"); 
             string InputText = Console.ReadLine(); 
             for (int i = 0; i < InputText.Length; i++) 
             { 
                 char MyChar = Convert.ToChar(InputText.Substring(i, 1)); 
                 int NewCharAsciCode = (int)MyChar + 32; 
                 Resault += Convert.ToChar(NewCharAsciCode).ToString(); 
                  
             } 
             Console.WriteLine(Resault); 
             Console.ReadKey();