Most efficient way to concatenate strings?

Question

What\'s the most efficient way to concatenate strings?

Answer 1

From Chinh Do - StringBuilder is not always faster:

Rules of Thumb

• When concatenating three dynamic string values or less, use traditional string concatenation.

• When concatenating more than three dynamic string values, use StringBuilder.

• When building a big string from several string literals, use either the @ string literal or the inline + operator.

Most of the time StringBuilder is your best bet, but there are cases as shown in that post that you should at least think about each situation.