I claim the ornamental design for a carrying case, as shown and described.
FIG. 1 is a front elevation view of a carrying case;
FIG. 2 is a top plan view of the carrying case according to the present invention;
FIG. 3 is a bottom plan view of the carrying case according to the present invention;
FIG. 4 is a side elevation view of the carrying case according to the present invention;
FIG. 5 is a side elevation view of the carrying case according to the present invention; and,
FIG. 6 is a rear elevation view of the carrying case according to the present invention.
The broken lines showing the pockets on the front and sides of the carrying case are for illustrative purposes only and form no part of the claimed design. The remaining broken lines illustrate claimed stitching.