Change String Case correctly

The correct way to change case of a string to uppr case.

class Program3
    {
        static void Main(string[] args)
        {
            string value = "dotnet";
            Console.WriteLine("Original: " + value);
            Console.WriteLine("Uppercase (invariant): " + value.ToUpperInvariant());
            Console.Read();
        }
    }

Result

DOTNET