Below code will helps us to find that string are equal or not and also find c# is case sensitive or not. Below code will helps you to understand that c# follow case sensitive.
public class Program
public static void Main(string args)
String x = "CrackYourInterview";
String y = "CRACKYOURINTERVIEW";
z = x.CompareTo(y);
And answer of above code is -1 which means c# is case sensitive