(a) A promise by a member to contribute to the limited liability company is not enforceable unless set forth in a writing signed by the member.
(b) Unless otherwise provided in an operating agreement, a member is obligated to the limited liability company to perform any enforceable promise to contribute cash or property or to perform services, even if the member is unable to perform because of death, disability, or other reason.
(c) If a member does not make the required contribution of property or services, the member is obligated, at the option of the limited liability company, to contribute cash equal to that portion of value of the stated contribution that has not been made.
(d) Unless otherwise provided in an operating agreement, the obligation of a member to make a contribution may be compromised only with the unanimous consent of the members.
(e) Only a creditor of a limited liability company who extends credit in reliance on an obligation to contribute or otherwise acts in reliance on that obligation to contribute after the member signs a writing which reflects the obligation to contribute pursuant to subsection (d) of this section may enforce any obligation to contribute.