[c#] JSONResult to String

I have a JsonResult that is working fine, and returning JSON from some POCO's. I want to save the JSON as a string in a DB.

public JsonResult GetJSON()
{
    JsonResult json = new JsonResult
    {
        Data = GetSomPocos()
    }; 
    return json;
}

I need to audit the response, so I want to save the json into a DB. I am having trouble finding a way to get the JSON as a string.

Any help is appreciated.

json = " { \"success\" : false, \"errors\": { \"text\" : \"??????!\" } }";            
return new MemoryStream(Encoding.UTF8.GetBytes(json));

You can also use Json.NET.

return JsonConvert.SerializeObject(jsonResult.Data);