ASP.NET

<configuration>
  <system.web>

    <httpHandlers>
      <add  verb="*" path="version" type="Handler"/>
    </httpHandlers>

    <compilation debug="true"/>
    <httpRuntime/>
  </system.web>
</configuration

namespace MvcPractise.Models
{
    public class Student
    {
        [Required(ErrorMessage = "First Name Required")] // textboxes will show
        [Display(Name = "First Name :")]
        [StringLength(5, ErrorMessage = "First Name cannot be longer than 5 characters.")]
        public string FirstName { get; set; }

        [Required(ErrorMessage = "Last Name Required")] // textboxes will show
        [Display(Name = "Last Name :")]
        [StringLength(5, ErrorMessage = "Last Name cannot be longer than 5 characters.")]
        public string LastName { get; set; }

        [Required(ErrorMessage = "DOB require")] // datepicker will show
        [Display(Name = "DOB :")]
        [DataType(DataType.Date)]
        public DateTime Dob { get; set; }

        [Required(ErrorMessage = "State Required")] // drodown will show
        [Display(Name = "State :")]
        public List<State> State { get; set; }

        [Required(ErrorMessage = "City Required")] // drodown will show
        [Display(Name = "City :")]
        public List<City> City { get; set; }

        [Required(ErrorMessage = "Language known Required")] // group of checkboxes will show
        [Display(Name = "Language known :")]
        public List<Language> Language { get; set; }

        [Required(ErrorMessage = "Sex Required")] // group of radio button will show
        [Display(Name = "Sex :")]
        public List<Sex> Sex { get; set; }

        [Required(ErrorMessage = "Computer Course Required")] // listbox will show
        [Display(Name = "Computer Course Done :")]
        public List<ComputerCourse> ComputerCourse { get; set; }

    }

    public class State
    {
        public string ID { get; set; }
        public string Name { get; set; }
    }

    public class City
    {
        public string ID { get; set; }
        public string Name { get; set; }
    }

    public class Language
    {
        public string ID { get; set; }
        public string Name { get; set; }
    }

    public class Sex
    {
        public string ID { get; set; }
        public string Type { get; set; }
    }

    public class ComputerCourse
    {
        public string ID { get; set; }
        public string Type { get; set; }
    }
}

Public Sub RaiseCallbackEvent(ByVal eventArgument As String) _
        Implements System.Web.UI.ICallbackEventHandler.RaiseCallbackEvent

        Try
            Page.ClientScript.ValidateEvent(ib_BasicApply.UniqueID)
            _cbMessage = "Correct event raised callback."

        Catch ex As Exception
            _cbMessage = "Incorrect event raised callback."

        End Try

    End Sub

    ' Define method that returns callback result.
    Public Function GetCallbackResult() _
        As String Implements _
        System.Web.UI.ICallbackEventHandler.GetCallbackResult

        Return _cbMessage

    End Function
    Protected Overrides Sub Render(ByVal writer As HtmlTextWriter)

        Page.ClientScript.RegisterForEventValidation(ib_BasicApply.UniqueID)

        If Not Me.Context Is Nothing Then
            RenderContents(writer)
        Else
            RenderDesignMode(writer)
        End If

    End Sub
Protected Overrides Sub OnInit(ByVal e As System.EventArgs)
        MyBase.OnInit(e)

   Dim cbReference As String = cs.GetCallbackEventReference("'" & Page.UniqueID & "'", "arg",   "ReceiveServerData", "", "ProcessCallBackError", False)
   Dim callbackScript As String = "function CallTheServer(arg, context) {" & cbReference & "; }"
   cs.RegisterClientScriptBlock(Me.GetType(), "CallTheServer", callbackScript, True)