Elmah error logging modules and handlers for ASP.NET is a great error logging module for asp.net application . You can easily set up Elmah to send emails by changing the elmah configuration section in your web.config.

You can find a sample of all the different elmah web.config settings here.  The email configuration settings are the following:

<errorMail
  from="elmah@nooglesoft.com"
  to="admin@nooglesoft.com"
  subject="..."
  async="true|false"
  smtpPort="25"
  smtpServer="smtp.nooglesoft.com"
  userName="johndoe"
  password="secret"
  noYsod="true|false" />

Customize the subject line

You can do that by specifying the String.Format parameters in the configuration section subject attribute like this:

<errorMail
  from="elmah@nooglesoft.com"
  to="admin@nooglesoft.com"
  subject="Cart Application (STAGING): {0}"
  />

These are just a few steps, as the latest reCAPTCHA library has all the pieces you need for asp.net MVC:

Step 1 – Create Your ReCAPTCHA Account
Go to the ReCAPTCHA site and sign up for your keys. You will get a private key and and a public key.

Step 2 – Download the .Net Library for ReCAPTCHA
Get reCAPTCHA Library and add this to your ASP.NET MVC project as a reference.
Step 3 – Create Action Filter and handle the Captcha validation
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Skipjack Come explore the many features that make Skipjack Transaction Network the leading payment gateway in North America.
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ADO.NET is the underlying data access API for .NET Framework (much like JDBC in Java). It’s been around since the first release of .NET.

LINQ to SQL is a data access framework built on ADO.NET and new language features that makes SQL Server data available natively in the object oriented style of programming. LINQ (Language-Integrated Query) and thus allowing to query data using programming language’s own syntax
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Linq IN query will pull back a set of results from SQL that is within a given range. This range can be set manually, or can itself be a query. So if you have an eCommerce application and you want to know what products you have in a given user’s cart

SQL

SELECT * FROM Product WHERE ProductID IN (SELECT ProductID FROM mycart)

Linq

List<int> itemQuery = new List<int>() {1,2,3,4};

var myProducts = from p in db.Products
                where itemQuery.Contains(p.ProductID)
                select p;

Linq To Sql only constructs the query when the Enumerator is tripped

This article recently which I thought was pretty cool. It describes how to build and use an ASP.NET Server Control that makes Google Map integration easy within ASP.NET applications:

Sending email in asp.net c# is one of the most common and reliable methods of communication for both personal and business purposes.

One of the big improvements in the configuration and maintenance of ASP.NET Web sites for version 2.0 is the ability to define common settings such as connection strings and mail server in a structured section of the web.config file

C#.net Coding Part

First add below mentioned namespace in code