ERROR Value cannot be null. Parameter name: source.

[HttpPost]

public ActionResult Search(DemoSearchModel model)

{

switch(model.SearchType)

{ case SearchTypeEnum.City:

var cities = new ESBFeedsService().QueryCityList().Data.Select(d=>d.ToObjectMap(false)).ToList();

var modelCities = new DisplayPropertyModels().Build(cities.ToList(),model.SearchType);

return View(modelCities);

case SearchTypeEnum.Property:

// var service = new ESBFeedsService();

var properties =new ESBFeedsService().QueryPropertyList().Data.Select(d => d.ToObjectMap(false)).ToList();

var modelProperties = new DisplayPropertyModels().Build(properties.ToList(), model.SearchType);

return View(modelProperties);

case SearchTypeEnum.Company:

var companies = new ESBFeedsService().QueryCompanyList().Data.Select(d => d.ToObjectMap(false)).ToList();

var modelC = new DisplayPropertyModels().Build(companies, model.SearchType);

return View(modelC);

case SearchTypeEnum.State:

var states = new ESBFeedsService().QueryStateList().Data.Select(d => d.ToObjectMap(false)).ToList();

var modelPt = new DisplayPropertyModels().Build(states, model.SearchType);

return View(modelPt);

}

return View();

}