C# String ToString()

public override string ToString()
public string ToString(IFormatProvider)

using System; 
		
    public class StringExample  
    {  
        public static void Main(string[] args)  
        { 
           string s1 = "Hello C#";
           int a = 123;
           string s2 = s1.ToString();
           string s3 = a.ToString();
           Console.WriteLine(s2);
           Console.WriteLine(s3);
        }  
    }