What is the difference between InvariantCulture and Ordinal when comparing strings in C#?

Hi everyone! I'm a beginner C# developer and I've encountered a problem with string comparison. In Microsoft documentation, I often see two methods: `String.Compare` with `StringComparison.InvariantCulture` and `StringComparison.Ordinal`. But I don't fully understand the difference between them and when to use which. For example, I have this code: ```csharp string str1 = "Straße"; string str2 = "STRASSE"; bool result1 = string.Equals(str1, str2, StringComparison.InvariantCultureIgnoreCase); bool result2 = string.Equals(str1, str2, StringComparison.OrdinalIgnoreCase); Console.WriteLine($"InvariantCulture: {result1}"); // True Console.WriteLine($"Ordinal: {result2}"); // False ``` Why are the strings considered equal when using `InvariantCulture`, but not when using `Ordinal`? After all