string json = JsonConvert.SerializeObject(objAcctDTable, Formatting.None);

"[{"AcctID":5822,"AcctName":"1 EDI SOURCE INC (Vendor)"},{"AcctID":4350,"AcctName":"21C OATS, INC. (Rail Customer)"},{"AcctID":5729,"AcctName":"24 Waterway LLC (Leasing Company Account)"},{"AcctID":3799,"AcctName":"3D CORPORATE SOLUTIONS LLC (Rail Customer)"},{"AcctID":4596,"AcctName":"3FNP (HINES 70 WEST MADISON LP) (Vendor)"},{"AcctID":6035,"AcctName":"3FNP LLC (Oracle Vendor)"},{"AcctID":4622,"AcctName":"3M CO (Vendor)"},{"AcctID":4532,"AcctName":"3M COMPANY (Oracle Customer)"},{"AcctID":5912,"AcctName":"5th3rd, BCC (Leasing Company Account)"},{"AcctID":5913,"AcctName":"5th3rd, UBOC, FNBC (Leasing Company Account)"},{"AcctID":5730,"AcctName":"8121 Broadway Interests, LLC (Leasing Company Account)"},{"AcctID":3324,"AcctName":"A E STALEY MFG. (Mileage Tax Customer)"}]"