ViewModel returns null on postback mvc 4

Make sure controller action method parameter object name not match with any its property.

This is model

public class QuestionModel

{

      [Required]

      public string Question { get; set; }

}

This is Controller Action method

[HttpPost]

public ActionResult Create(QuestionModel Question)

{

      //Add your code here

}

Create method parameter QuestionModel Question object name matching with its property Question.

In this case when we post data from view to controller ViewModel returns null.