Passing list of objects from Angular to Web API

How to pass list of object from Angular to a Web API ?

I tried it using content-type as application/json but it shows CORS preflight error.

Following is the Web API Post Method :

 [HttpPost]
  public bool getDetails(List<Subnets> data)
  {
      //Logic here
  }

Following is the angular code :

 $scope.save = function (jsondata) {

    $http({
        method: "POST",
        url: "http://localhost:60262/api/IPUpload/getDetails",
        data: jsondata,
        headers: {
            'Content-Type': 'application/json'
        }
    }).then(function (data) {
        alert('success');
        if (data.status) {
            $scope.msg = "Data has been inserted ! ";
        }
        else {
            $scope.msg = "Error : Something Wrong";
        }
    }, function (error) {
        alert('fail');
        $scope.msg = "Error : Something Wrong";
    })

}

Following is the Subnet class :

 public class Subnets
{
    public string ID { get; set; }
    public string Subnet { get; set; }
    public string IPAddress { get; set; }
    public string ServerName { get; set; }
    public string Mac { get; set; }
    public string Vmware { get; set; }
    public string Usage { get; set; }
    public string Owner { get; set; }
    public DateTime ExpiryDate { get; set; }
    public string Email { get; set; }
    public string SwitchIP { get; set; }
    public string SwitchPort { get; set; }
    public string PortVLAN { get; set; }
    public string Zone { get; set; }
    public string Justification { get; set; }
    public string CustomerID { get; set; }
    public string Remarks { get; set; }
}

I tried using content-type as ' application/x-www-form-urlencoded; charset=UTF-8'. It calls the API action method but the parameter "data" is empty. With content-type as 'application/json', it shows CORS preflight error.

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://localhost:60262/api/StaticIPUpload/getDetails. (Reason: CORS header ‘Access-Control-Allow-Origin’ does not match ‘(null)’).

Thanks in advance.

Solution :

I added following piece of code in global.asax and it worked :

 protected void Application_BeginRequest()
    {
        if (Request.Headers.AllKeys.Contains("Origin") && Request.HttpMethod == "OPTIONS")
        {
            Response.Flush();
        }
    }