Use tabs, not spaces in your patches
- Private class fields using camelCase, eq. firstName;
- Properties are PascalCased, eq. FirstName;
- Public, protected and private methods are PascalCased, eq. FindPersonByFirstName;
- Order of members in a class: fields, constructors and then everything else;
- Some folks like 2 spaces, some like 4, but that's an IDE setting. Change your IDE settings to use tabs, not spaces, and then you can set your tab to 2 spaces if you prefer that.