public static void Main()
Console.WriteLine("Enter a string");
string str1 = Console.ReadLine();
string lower1 =str1.ToLower();
Console.WriteLine("Enter another string");
string str2 = Console.ReadLine();
string lower2 =str2.ToLower();
if(lower1.Trim() == lower2.Trim())
Console.WriteLine("equal");
Console.WriteLine("not equal");