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C# Credit Card Validation Class

Here a quick hitter for you - this little piece of code allows you to validate a credit card (in C#) before submitting for processing. This should work with Visa, Mastercard, Disco...

c# americanexpress card credit mastercard snippet validate visa
Atul Ahuja

8/5/2015
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2980
C# Parse Meta Tags

You may come across an instance in your C# and ASP.NET programming where you need to download an external webpage and parse the meta tags... specifically, the "Title," &q...

c# regex parse getmeta meta multiline tags
Atul Ahuja

8/5/2015
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1456
C# RSS Feed Generator

C# RSS FEED GENERATOR - This is a snippet of code that you can simply paste into your own code to generate a C# RSS

c# generator Feed RSS code
Atul Ahuja

8/5/2015
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1298
C#: Remove illegal characters from path and filenames

If you want to remove invalid chars "* . " / \ [ ] : ; | = ," from file name below is the code which can help you Sample code: using System; using System.IO; using S...

c# regex
Raghav Khunger

3/14/2014
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6617
C#: Swap two integer variables value

In this blog I will show you how to swap two integer variables. I will be using Interlocked.Exchange to do the same: using System; using System.Threading; namespace SampleConsoleAp...

c#
Raghav Khunger

1/17/2014
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3678
Regex: Replace single backslash with double backslash

In this blog I will show how to replace single backslash with double backslash in a string with REGEX. Let's say we have a string "This is \ test \ string" and we wan...

c# regex
Raghav Khunger

1/9/2014
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3596
Regex: Replace replace uppercase letter with underscore and the letter

In this blog I will show how to replace uppercase letter with "underscore and the letter "in a string with REGEX. Let's say we have a string "ThisIsTestString&qu...

c# regex
Raghav Khunger

1/9/2014
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3351
Regex: Allow alphanumeric characters only

In this blog I will show how to validate a string to allow alphanumeric characters only in a string with REGEX. Below is the sample code to do the same: using System; using System....

c# regex
Raghav Khunger

1/8/2014
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2856
Regex: Remove all non numeric characters from a string

In this blog I will show how to remove all non numeric characters from a string with REGEX. Let's say we have a string "(912)-555-7777" and remove all non numeric cha...

c# regex
Raghav Khunger

1/7/2014
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2510
Regex: Remove all non alpha numeric characters from a string

In this blog I will show how to remove all non alpha numeric characters from a string with REGEX. Let's say we have a string "Hello!@#$123456789~~-_user456welcome" an...

c# regex
Raghav Khunger

1/7/2014
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3261
Regex: Reverse all numbers in string

In this blog I will show how to reverse all numbers in string with REGEX. Let's say we have a string "Hello 123456789 user 456 welcome." and we want to reverse it lik...

c# regex
Raghav Khunger

1/6/2014
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2370
Regex: Can not access non-static method Replace in static context

I encountered a piece of code where regex replacement was done in the following way: Regex.Replace(@"\d+", m => new string(m.Value.Reverse().ToArray())); It was gi...

c# regex
Raghav Khunger

1/6/2014
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2774
Path too long error message when exceeding MAX_PATH

While using Directory.GetFiles I started getting the following excpetion Path too long error message when exceeding MAX_PATH Luckily I came across the following library: Delimon.Wi...

c#
Raghav Khunger

12/27/2013
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1772
File.Move: Access to the path is denied

While using the File.Move method to move a file from one location to other: File.Move(oldPath, newPath); I was getting the following exception: Access to the path is denied. Except...

asp.net c# file-move
Raghav Khunger

12/27/2013
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3703
No "pause" option in latest Call of Duty Ghosts offline multiplayer (Squads)

This is an off-topic post. I had to blog about it because Activision deserves to be slammed for not providing the pause option when playing "extinction" or "squad&qu...

asp.net c#
Vivek Thakur

11/16/2013
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3042
C#: Copying all directories of a folder to backup folder inside it

Below is the code which can help you to copy all the folders and files of a directory to a backup folder inside it. Let's create a helper class to do the same: #region Using Di...

c# directory-info
Raghav Khunger

10/30/2013
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5655
C#: String.format not working with curly brace '{' inside it

I was working with a program noticed where I needed to use curly itself inside a string and string.format was not wroking with it. I was having the following sting: string myString...

c# string.format
Raghav Khunger

6/28/2013
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1762
Avoid windows authentication login prompt in IE

If you are using Windows Authentication and want to avoid the login prompt which comes when you try to access the application this blog will help you. The solution I am writing bel...

asp.net c# iis7 windows-authentication
Raghav Khunger

4/19/2013
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2724
Find the missing properties from a class by comparing with other class

Lets say we have two classes Person1 and Person2. Below is the code for it: public class Person1 { public int ID { get; set; } public string Name { get; set; } public string FirstN...

.net c#
Raghav Khunger

4/15/2013
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1893
RegEx: Quantifier {x,y} following nothing error

While parsing one of my regex pattern based on input data I was getting the following error: RegEx: Quantifier {x,y} following nothing error I was having the following code: string...

c# regex
Raghav Khunger

4/11/2013
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5157
Transmit file not working when file name contains spaces

While working with transmitting files via server side was not working when filename was having space

asp.net c#
Raghav Khunger

2/18/2013
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3932
.NET: Get mimetype/contenttype from file name/extension

In order to get mimetype/contenttype from file name/extension you need to make use of "System.Web.Mi

.net c# .net-4 content-type mime-type
Raghav Khunger

11/4/2012
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8194
Registry.LocalMachine.OpenSubKey() returns null on 64 bit machine

The reason of this issue is that on 64 bit process uses WOW64 folder. You need to write the code whi

c# registry
Raghav Khunger

11/2/2012
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9642
C#: How to get connection string stored in Registry

I will show you how to get connecting string stored in registry. The code which I will show in this

c# registry
Raghav Khunger

11/2/2012
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6863
C#: Get file name of all the files inside a directory:

Considering all subdirectories: string directoryPhysicalPath="xxxx"; string[] files = Directory.GetF

c# files
Raghav Khunger

10/13/2012
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3238