ADO.NET :: How To Store Datatime Into Database - Linq

DateTime dt = DateTime.Now; tbl_Payment tbl_Payments = new tbl_Payment() { UserId = UserID, PaymentType = DropDownList4.Text, AmountDeposit =10, Date = String.Format("{0:d/M/yyyy HH:mm}", dt); Compilation Error Compilation Error Description: An error occurred during the compilation of a resource required to service this request. review the following specific error details and modify your source code appropriately. Compiler Error Message: CS0029: Cannot implicitly convert type 'string' to 'System.DateTime?' Source Error: Line 683: PaymentType = DropDownList4.Text, Line 684: AmountDeposit =10, Line 685: Date = String.Format("{0:d/M/yyyy HH:mm}", dt), Line 686: Line 687: }; Using LINQ for data storage. In Table I column "Date" datetime. How to save a date in the table?