var match = string.Compare(str1, 0, str2, 0, 5) == 0;

string string1 = "Hello";

string string2 = "World";

​

// Case-sensitive comparison

bool areEqualCaseSensitive = string1 == string2;

​

// Case-insensitive comparison

bool areEqualCaseInsensitive = string1.Equals(string2, StringComparison.OrdinalIgnoreCase);

​

// Output the results

Console.WriteLine("Case-sensitive comparison: " + areEqualCaseSensitive);

Console.WriteLine("Case-insensitive comparison: " + areEqualCaseInsensitive);