| JoinQuoted(Char, Char, IEnumerableString) | Concatenates the members of a collection, using the specified separator between each member, and surrounding each non-null member by the specified quote char. |
| JoinQuoted(StringBuilder, Char, Char, IEnumerableString) | Concatenates the members of a collection, using the specified separator between each member, and surrounding each non-null member by the specified quote char, appending to StringBuilder |