Update In LINQ not Working

Problem: I am working on a console application and I have a table in my .DBML File as FirstTable

I am using following code written below to update a field "Father Name" but it is still not updating it in Relational Database MS SQL.

VB Code:

Imports System.Data
Imports System.Collections.Generic
Module Module2
    Dim DB As New NorthWinddatacontext()

    Sub main()

        Dim UpdateName = (From p In DB.FirstTables Where p.Name = "Yousuf"
                       Select p).Single

        UpdateName.FatherName = "Hashmi1"
        DB.SubmitChanges()
    End Sub

My code is not working

Solution: You have not set any Primary Key on Your Table  in your Relational Database.Make a Primary Key and try the same code again by Droping the table again on Your DBML.

is neither a DataColumn nor a DataRelation for table DefaultView

Problem: I get this error when I try to filter any column in my RadGrid.I am using template columns.

"is neither a DataColumn nor a DataRelation for table DefaultView"

Here is my code of a Column

<telerik:GridTemplateColumn HeaderStyle-HorizontalAlign="Center" HeaderText="PO #" Visible="true">
 <ItemTemplate>
<asp:Label ID="lblPONumber" Text='<%# Eval("_PONumber") %>' runat="server">
</asp:Label>
</ItemTemplate>
<HeaderStyle HorizontalAlign="Center" />
</telerik:GridTemplateColumn>

Solution: You have to check that DataField property is present or not.

Here is corrected Code

<telerik:GridTemplateColumn DataField="_PONumber" HeaderStyle-HorizontalAlign="Center" HeaderText="PO #" Visible="true">
 <ItemTemplate>
<asp:Label ID="lblPONumber" Text='<%# Eval("_PONumber") %>' runat="server">
</asp:Label>
</ItemTemplate>
<HeaderStyle HorizontalAlign="Center" />
</telerik:GridTemplateColumn>

First Column of RadGrid to stay visible

Problem: I have many columns in my RadGrid ,I want first column to stay visible while scrolling.Only first column should appear all the time.
Solution: This can be done using FrozenColumnsCount in ClientSettings tag.

Example:

<telerik:RadGrid ID="radGridServices" runat="server">

    <MasterTableView CommandItemDisplay="Top" DataKeyNames="Services_ID_PK" ClientDataKeyNames="Services_ID_PK">

    </MasterTableView>

    <ClientSettings>

        <Scrolling AllowScroll="true" FrozenColumnsCount="1" SaveScrollPosition="true" UseStaticHeaders="true" />

        <ClientEvents />

    </ClientSettings>

</telerik:RadGrid>

Simple handling Of Events In Visual Basic .NET 4.0 Using Handler

Problem: How to handle events in Visual Basic .NET 4.0 using Handler ? 
Solution: Just Copy The Whole Code Below in Console Application

VB Code:

Module Module1
    Sub Main()
        Dim objWork As New Worker
        AddHandler objWork.WorkDone, AddressOf work_WorkDone
        objWork.DoWork()
    End Sub

    Private Sub work_WorkDone(ByVal completedWork As Integer)
        Console.WriteLine(completedWork)
    End Sub
End Module

Public Class Worker
    Public Event WorkDone(ByVal completedWork As Integer)
    Public Sub DoWork()
        For completedWork As Integer = 1 To 100
            System.Threading.Thread.Sleep(1000)
            RaiseEvent WorkDone(completedWork)
        Next
    End Sub
End Class

C# Code:

using Microsoft.VisualBasic;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics; 

static class Module1
{
   public static void Main()
   {
     Worker objWork = new Worker();
     objWork.WorkDone += work_WorkDone;
     objWork.DoWork();

   }
}

private static void work_WorkDone(int completedWork)
{
   Console.WriteLine(completedWork);
}

public class Worker
{
   public event WorkDoneEventHandler WorkDone;
   public delegate void WorkDoneEventHandler(int completedWork);

   public void DoWork()
   {
     for (int completedWork = 1; completedWork <= 100; completedWork++)

     {
       System.Threading.Thread.Sleep(1000);

       if (WorkDone != null)

       {
         WorkDone(completedWork);
       }
     }
   }
}