The ornamental design for a foldingchair, as shown and described.
FIG. 1 is a perspective view showing the top, front and right side of a folding chair which forms my new design wherein said folding chair is in an unfolded condition;
FIG. 2 is an enlarged detail thereof taken from FIG. 1;
FIG. 3 is a front elevational view thereof in the unfolded condition;
FIG. 4 is a front elevational view thereof in a folded condition;
FIG. 5 is a rear elevational view thereof in the unfolded condition;
FIG. 6 is a rear elevational view thereof in the folded condition;
FIG. 7 is a right side elevational view thereof in the unfolded condition, this view and the opposite left side elevational view being mirror images; and,
FIG. 8 is a right side elevational view thereof in the folded condition, this view and the opposite left side elevational view being mirror images.