No dissolution of such district shall invalidate or affect any right accruing to such district, or to any person, or invalidate or affect any contract or indebtedness entered into or imposed upon such district or person; and whenever the county commission shall, under the provisions of section 235.260, dissolve any such district, the said commission shall appoint some competent person to act as trustee for the said district so dissolved, and such trustee before entering upon the discharge of his duties shall take and subscribe an oath that he will faithfully discharge the duties of his office, and shall give bond with sufficient security, to be approved by the county commission, to the use of such dissolved district, for the faithful discharge of his duties, and shall proceed to liquidate said district under orders of said commission.