Assume that we need to upload a file  and save its name, and the file in the database table. so lets see how we do it.

This is my Table

CREATE TABLE [dbo].[Files2](
    [ID] [int] IDENTITY(1,1) NOT NULL,
    [FileName] [varchar](50) NOT NULL,
    [FileSource] [image] NOT NULL,
 )
GO

And The Following Stored Procedure is used to Insert the Value:

CREATE PROCEDURE [dbo].[ADDFILE]
(
    @FILENAME VARCHAR(50),
    @FILESOURCE image
)
AS
SET NOCOUNT ON

INSERT INTO Files([FileName],[FileSource])
VALUES(@FILENAME,@FILESOURCE)

And the following code is used to upload and save the file using web form with a text box for file name, and a file upload control to upload the file. on the click event of a button this code is called.

protected void Button1_Click(object sender, EventArgs e)
{

     if (FileUploader.HasFile && FileUploader.PostedFile.ContentLength > 0)
      {
          string filename = txtFileName.Text;
          //Read the file in to a byte Array.
          byte[] filebyte = FileUploader.FileBytes;

    System.Data.Linq.Binary fileBinary = new System.Data.Linq.Binary(filebyte);
          MyDataDataContext MyData = new MyDataDataContext();

          MyData.ADDFILE(filename, fileBinary);
          lblStatus.Text = "File Uploaded Successfully!";

        }
}

The Main thing to remember here is that we need to pass the FileUploader.FileBytes  to the constructor of System.Data.Linq.Binary.

To Learn more about LINQ to SQL Please visit Here.

 EDIT: Richie just showed another way to achieve this in his blog here.

so I decided to help them all out, but I don’t want to fill the blogsphere with another post of LINQ, WPF or WCF, because its already filled with a lot of articles on them by geek’s and various people around the world.so what I’m going to do is post some valuable links on where you can give a kick start on learning these.

1. To get visual studio 2008 read the post here.
2. The first and best place I would recommend to learn is reading Scott Guthrie’s web blog. he had written some excellent articles on these new technologies. I would recommend you to subscribe his blogs feeds or book marking his blog for future reference. here is are some valuable articles by him.
   1. Using LINQ with ASP.Net in VS 2008.
   2. Scott Guthrie – First Look at ORCAS.
   3. New “ORCAS” C# 3.0 Language Features: Automatic Properties, Object Initializers and Collection Initializers.
   4. New “ORCAS” Language Features : Extension Methods.
   5. New “ORCAS” Language Features : Lambda Expressions.
   6. New “ORCAS” Language Features : Query Syntax.
   7. New “ORCAS” Language Features : Anonymous Types.
   8. and the following are Scott’s posts on LINQ
      • • Part 1: Introduction to LINQ to SQL
        • Part 2: Defining our Data Model Classes
        • Part 3: Querying our Database
        • Part 4: Updating our Database
        • Part 5: Binding UI using the ASP:LinqDataSource Control
        • Part 6: Retrieving Data Using Stored Procedures
        • Part 7: Updating our Database using Stored Procedures
        • Part 8: Executing Custom SQL Expressions
        • Part 9: Using a Custom LINQ Expression with the Control
3. Another Place to Learn About LINQ is LINQ in Action . this site with its popularity has been written as a book also for more information visit here.
4. And now for WPF. here are the web sites which helped me to build my WPF knowledge.
   1. Windows Client official web site WPF Video Tutorials
   2. The Content Presenter
   3. The WPF Blog
5. And so far to lean Silverlight would recommend the official Silverlight web site.
6. and below are some more links which you might be interested in:
   1. Parallel Language Integrated Query (PLINQ)
   2. ASP.Net 3.5 Video Tutorials.
   3. 101 LINQ Samples.
   4. Xceed WPF Data Grid Component -Free full Version (1 Developer Licence ).
7. And finally The Official Visual studio 2008 training kit by Microsoft

Well These are the sites which I visit often to learn about these new technologies. I’m just sharing these with you to make it easy to find about these and learn them easily without spending much time to search for these.

I hope it helped you, Enjoy!!.