Literal Notation

You can use object-literal notation in constructing an object.

Card c = new Card { Rank = '5', Suit = 'D' };
Card c = new Card() { Rank = '5', Suit = 'D' }; // Equivalent to above.
Card c = new Card(suit: 'D') { Rank = '5' }; // You can get crazy with this.

The names in the brackets are public fields of the Card class, not the names of the parameters in the constructor.