The ornamental design for an edgecornerguard, as shown and described.
FIG. 1 is an upper right, front perspective view of a corner guard showing my new design.
FIG. 2 is a front elevation view of the corner guard of FIG. 1.
FIG. 3 is a right side elevation view of the corner guard of FIG. 1.
FIG. 4 is a rear side elevation view of the corner guard of FIG. 1.
FIG. 5 is a left side elevation view of the corner guard of FIG. 1.
FIG. 6 is a top plan view of the corner guard of FIG. 1; and,
FIG. 7 is a bottom plan view of the corner guard of FIG. 1.
The edge corner guard is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.