How to return Json from WCF Service? -

I have a template code under the AJAX enabled WCF service. What can I do to return JSON instead of XML? Thank you.

  using the system; Using System.Linq; Use the system. time. Timeliness; Using System.ServiceModel; Using System.ServiceModel.Activation; [SOPNT Compatibility Rewari (RequirementsMod = ASPNET CompatibilityRirementMode.Alvard)] Public Sector Cost Service [// HPPET GET [Operation Contract] [WebGate] Add WebGet Attribute to Use the Public Double CostOffSundWatch {Return 1.25 * Quantity; }}  

You have tried:

  [WebGet (Response format = WebMessageJason)]