How to add thousands separators (commas) to a number when formatting a string in C#?

Hi everyone! I'm a beginner C# developer and I've encountered a task: I need to display a number with thousands separators — that is, the number 1234567 should be displayed as "1,234,567". I'm using `String.Format()` or simply inserting a variable into a string via `$""`, but I can't achieve the desired result yet. Here's an example of my code: ```csharp int number = 1234567; string result = String.Format("Sum: {0}", number); Console.WriteLine(result); ``` The output is just "Sum: 1234567", but I need "Sum: 1,234,567". I tried adding different format specifiers to the format string, but so far without success. Please advise how to do this correctly? Preferably with code examples so I can test it right away. Thanks in advance! <<>>

Using the "N" or "n" format specifier