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Learn better ways to code in C#

Sensible coding part I – Howz your product???

Posted by codingsense on March 26, 2014

After few years of experiencing development in various projects and technologies, I started to think of reflecting my past on what went right and what went wrong in terms of development for self appraisal.

While analyzing I found couple of common things that happens in a life time of a product and people working on it.

Kick off a project – Happy birthday to our new project (Year 0):
Product is getting born, very much in versatile state. Lets name it Mr Perfect. Management bless Mr Perfect to be built with world class code and can sustain any changes in the requirement and will live long and long with good health and bring a very good name to the company.
Best competent people are selected for the team. Everyone in the team are excited about the new deliverable that are planned, we can see the excitement and energy in the team. All are busy in learning a new technology or new version of technology, people come up with different approaches for any given problem. Working with such team seems wonderful.

First release of Mr Perfect (Year 1):
Product has survived the first release and any changes or bug fixes have not effected it. People start working on new requirements and changes that comes from the filed users very positively.

Second release of Mr Perfect (Year 2):
Lots of changes and bug fixes were done, new and new features are getting pushed into the product. Deadlines are short, managers ask for quicker deliveries, customer asks for quicker fixes. People start to doing hard work and ignore smart work to achieve the goals.

Third release of Mr Perfect (Year 3):
The product has grown big with more than half million lines of code. People have created a mindset on which feature is good and which feature is bad ( few techies call it legacy code :) ). The feature that are labelled legacy, is creating panic in the people who are associated with it. If there is any bug raised in it, they start to panic and get frustrated sometimes.

Fourth release of Mr Perfect (Year 4):
Our marketing and requirement guys go to customer to check how do they feel about the product and what else they need. They come up with a big list of new features, scrap some features and list of customer complaints on improper support.
Development team is unable to digest the changes, they start looking for workarounds, hiding some features, implementing new features.

BOOOOMMMMMMMM!!!!

What are the probable outcomes?? any guesses??
Check which all of the below listed would be true.

  • A bug fix in one module, starts creating impact on some other module.
  • The code is hard to understand, very fragile and not versatile.
  • Duplicate code is introduced everywhere, any fixes at one place should be fixed everywhere.
  • Performance of the product is very low.
  • Loads of memory leaks results in slow performance and crashes the tool often.
  • Removing a feature is not easy since some of its classes is used by many of them.
  • Development team asks for much higher estimations to achieve even a small change.
  • Bugs reported in critical features (Legacy code) are ignored and delayed as much as possible.
  • Quality team raises non compliance on some features with more bugs.
  • Managers are worried about their competent team.
  • Development team suggests lets refactor the features or build a new product.

Blah Blah Blah..

Guess what would happen to such Mr Perfect product or the customers who rely on them?

Has anyone seen these problems in the product?? What went wrong suddenly just last year everything was fine?? Is there any solution for this??

Let me know your comments if you have seen such issues or are living with it or overcame it.
hmm I bet there has to be some solution for such :)

Next >> Sensible Code part-ii What is software quality?

Happy Learning :)

Posted in C#, Codingsense, Solutions | Tagged: , | Leave a Comment »

Zip/Unzip using System.IO.Package in .Net

Posted by codingsense on December 5, 2010

I was working on a project where it was required to zip and unzip files, these days we were using Cabarc.exe and all was working fine. Now we planned to give unicode support and booom!! cabarc.exe failed to zip the folder, since it does not support unicode characters. I found that there are many open source projects like SharpZipLib, DotNetZip etc. But we did not wanted to use the available open source projects to implement it. So I decided to search for some other option and what I found is System.IO.Package in WindowsBase.dll. It exposes a class called Package which will help to pack and unpack files and folders.

Download Source code (13 Kb)

I have made a separate dll (CustomPackage.dll) that you can use for zipping and unzipping of folders. I have also created a dummy project PackageWrapper to help you understand how to make calls to the dll.

Features:

  • The project supports Unicode characters in folder or files (Limitation with Cabarc.exe)
  • Zipping is done also for all sub directories . While unzipping the same directory structure will be maintained.

Improvements for you to do:
I have used Mime Type as MediaTypeNames.Application.Octet to make it generic and support all kind of files and have used the compression option CompressionOption.NotCompressed since the mime type will not compress. If you know that you will have only similar type of files to zip or unzip then you can select proper Mime type and compression option as CompressionOption.Maximum to compress the files to maximum extent.

For any kind of improvements or clarifications please feel free to comment.

Happy Coding :)
Codingsense

Posted in C# | Tagged: | Leave a Comment »

Get all controls on a windows form without recursion

Posted by codingsense on July 22, 2010

Hi,

Its given in microsoft patterns and practices to consider replacing recursion with looping because each recursive call adds data to the stack. Examine your code and see if your recursive calls can be converted to a looping equivalent.

I was wondering if all the solutions that uses recursion can be replaced without using recursion.
So I took the first step in looking into my project and found a piece of code that was using recursion, a function that would give me all the controls on a windows form. So I decided trying to convert that code without the use of recursive call.

Here is what I came up with,



static IList getControls(Control ParentControl)
{
List<Control> ListOfControls = new List<Control>();
List<Control> ContainerControls = new List<Control>();
ContainerControls.Add(ParentControl);

while (ContainerControls.Count > 0)
{
foreach (Control control in ContainerControls[0].Controls)
{
if (control.Controls.Count > 0)
{
ContainerControls.Add(control);
}
ListOfControls.Add(control);
}
ContainerControls.Remove(ContainerControls[0]);
}
return ListOfControls;
}

Great, the method gave me proper result as compared with the recursive function, what next I wanted to see how it has increased in performance and I used stopwatch to determine the time taken by both of the methods on the same form which was heavily loaded with controls and containers, it had 82 controls on it. The time taken by recursive function was double the time taken by the new method.

So I concluded that replacing recursive method with looping will enhance performance and also helps in consuming less memory.

If you get a better way to overcome recursion then please feel free to comment, till then I will continue my search for more recursive calls in my code.

Happy Learning :)
Codingsense

Posted in C# | Tagged: , | Leave a Comment »

Writing Custom FxCop Rules

Posted by codingsense on May 23, 2010

FxCop is a static analysis tool that you can use to write custom rules those need to be followed by the developers. Writing custom rules in FxCop is very easy, in the beginning you will feel it bit complex since there are no much help available on web but once if you have written a rule you will be preety much confident that you can write any rule you desire.

Download FxCop

SInce FxCop analyses IL code from your assemblies, we should know about some of the keywords of IL to write complex rules. Use this sheet as a reference while seeing your IL code through ILDASM.

I have created a template project for Custom FxCop Rules for you which you can use and add your rules. So that you can concentrate more on Custom Rules rather than creating the project.

Download CustomFxCopRules template

If you want to add any new rule you have to follow these steps using the above template.

  1. Create a class and name it with the rule.
  2. Create a new node of that of the classname (not necessary but only for easier reference) in CustomRules.xml with desired settings
  3. Create a constant with the same name and value in Constants.resx file
  4. Write your logic in that class

And to debug the rules that you have written here is a post
http://social.msdn.microsoft.com/forums/en-US/vstscode/thread/b92a0416-bf20-40c1-88a0-8fcff07133dc/

More References:
http://www.binarycoder.net/fxcop/pdf/fxcop.pdfhttp://www.binarycoder.net/fxcop/pdf/fxcop.pdf
http://www.nmentor.com/Blog/Tutorials/1.%20How%20to%20Write%20Custom%20FxCop%20Rule.pdf

I will put some of the custom rules in coming post which willl cover all the required topics to make you understand FxCop better. If you want any specific rule, then feel free to post a comment to me and I will help you out :)

Happy Learning
Codingsense :)

Posted in C# | Tagged: | Leave a Comment »

Steps to improve maintainability of your code

Posted by codingsense on May 13, 2010

Hi,

I have seen people always telling that maintaining a product is harder. All people want to go into the product or module where its building from the scratch and pass the older code to our juniors. Why?? Is it that we want to learn new things or we don’t want to waste time in the product where we have put lots of effort to ruin it or are we afraid??

Is there any easy way to convert bad code to good code. Its not like moving a magic wand and all code is straight. First of all we should accept that its our mistake, unless we accept our mistake we keep giving hundreds of reasons to run away from it. We should have interest in making it good, plan properly and execute with determination. Here’s my story wherein I have gone through phases from good to bad and bad to good.

Two years back in Feb 2008 I started a product and was playing a role of tech lead. There were lots of eyes and concerns on that product that it will be a game changer for our company. There was a long list of feature given by our functional team, plan to combine 2 existing product functionality into one, easy navigation, and the old saying was repeated “URGENT REQUIREMENT” we were given 1 year for the first product release. So it began, planning of modules, prioritizing the features, coding standards was revisited, right features were assigned to right persons etc etc. Full team was motivated to work in the upcoming successful product.

Days passed… somewhere after 6 months an internal release was planned for the functional team and for the stakeholders. Great all were happy, I and my team got many awards, good recognition in the company and got some suggestions (also known as changes) in the software. All changes were incorporated successfully with the new features parallel development.

All was going great, until after some 5 months (1 month left for delivery) some expert gave (very late) a very good suggestion to the management for future perspective. When we received the document of changes they were huge, major changes had to be done in many of the key classes. All teammates were sort of disappointed that their feature which was done with lot of hard work and interest would be corrupted. They started blaming the management, for such changes. But all cooperated since we were the experts and it would be shame to go against the changes expected.

Now started the actual impact, changes were planned, one change would affects other flow, dependency between the classes was more, poor commented code, testers started doing stress testing on the bug tracking tool by putting more and more bugs in it.All team was under stress, daily pig meetings were started to know the status. Day by day the deadlines were nearing and the features and bugs were poured more on us.

Finally we ended up not giving the full product in the expected deadline. The days of the awards and recognition were gone. For next week I and some senior members were very busy in answering what went wrong and why we dint reach the target. Since there was intense pressure from the marketing team the product was shipped to the customers who were waiting for it. There were still more changes pitching in and we were very much tensed how to incorporate those without creating regression bugs in our product. Many bugs were reported by the customer and fixing them was a huge task for us.

On one evening was not feeling to go home so stayed till night I thougth that I and my team were responsible for the bad code and we are the one going to fix those and show our potential. I started recollecting all the mistakes that were done by me and my team and started documenting it, further found some tips across the web and added those. After analyzing the entire problem I found angle of deviation that we had been from our actual goal and plans and listed all the faults that we had done. Made up my mind to speak to the management in the early morning regarding it and get some time to refactor and restructure the code. The following steps were planned to be executed with intense care.

  • Put proper comments
  • Fix coding standards and project conventions
  • Remove unnecessary code
  • Identifying and breaking up big classes
  • Breaking up big methods
  • Refactor existing code
  • Remove memory leaks
  • Restructuring
  • Write automated unit tests

After following each step properly with collecting the daily status from the team, sharing the problems and discussing some new solutions, finally it took around 7 months to complete the product.
Even though we were late by 8 months we had reached the goal properly and were ready to accept any further changes. From last year the product was sent to the market and there was very good response from our customers and the days of awards had begun again.
From next posts I am planning to go in depth of execution of each of the steps followed.

For any clarification please revert back.

Happy Coding
Naveen Prabhu :)

Posted in C#, Solutions | Tagged: , , | Leave a Comment »

Why Avoid Exception

Posted by codingsense on March 16, 2010

Hi,

Last week I was optimizing a module, as I was working I found that if exceptions are avoided then we can save lot of fruitful time. So made the below sample to see how much time we can save by avoiding an exception.

In below sample a method just iterates and another method throws an exception.




using System;

namespace ConsoleApplication1
{
class Program    
{
static void Main(string[] args)
{
System.Diagnostics.Stopwatch sw = new System.Diagnostics.Stopwatch();

sw.Start();
loopProper();
sw.Stop();
Console.WriteLine("Looping Time : " + sw.ElapsedMilliseconds);

sw.Reset();
sw.Start();
ThrowException();
sw.Stop();
Console.WriteLine("Exception not hanlded Time : " + sw.ElapsedMilliseconds);

Console.Read();
}

static void loopProper()
{
for (long Index = 0; Index < 350000; Index++)
{

}
}

static void ThrowException()
{
long Temp = 0;
long Zero = 0;

try            
{
Temp = Temp / Zero;
}
catch (ArithmeticException ex)
{

}
}
}
}



After running the above sample we can find that an time taken by just one exception is approx around time taken by 3,50,000 iterations. So if we can avoid exceptions then we can do more fruitful work in the same time.

I dont mean that exception handling should not be used, but try to avoid it to maximum. If you can use some if conditions where you know the line might give an exception, and see how the performance increases.

Any about my output, the module had a algorithm that would take 80-85 sec to complete and after optimization its taking 2 sec to complete. Changes in logic of the algorithm and exception handling increased the performance drastically.

Happy learning,
Codingsense :)

Posted in C# | Leave a Comment »

Aborting a suspended thread

Posted by codingsense on March 16, 2010

Hi,

I was working on a multithreading application and found an interesting thing on resuming a thread, so planned to share with you.

When a thread is running if we abort it, it gets stopped. But if a suspended thread is aborted then it gives an exception “Thread is suspended; attempting to abort”.

The below sample demonstrates it, first the thread is started, then suspended and then aborted. Run the application and check the error.




using System;
using System.Threading;

namespace ConsoleApplication1
{
class Program    
{
static void Main(string[] args)
{
Thread thread = new Thread(new ThreadStart(DoSomething));
thread.Start();

for (int Index = 0; Index < 10; Index++)
{
switch (Index)
{
case 4:
thread.Suspend();
Console.WriteLine("Thread suspended");
break;

case 6:
thread.Abort();
Console.WriteLine("Thread aborted");
break;

}

//Main Thread is made to sleep                
Thread.Sleep(300);
}

Console.Read();
}

private static void DoSomething()
{
while (true)
{
Thread.Sleep(300);
Console.WriteLine("I am busy doing work");
}
}
}
}


To overcome this exception we can use Resume to invoke the suspended thread and then abort.
Replace the case 6 with below code snippet.




case 6:
try                        
{
thread.Abort();
}
catch (ThreadStateException)
{
thread.Resume();
}
Console.WriteLine("Thread aborted");
break;


now running the application aborts the thread as expected.
From this sample we can learn that if we use resume on a suspended thread then it starts again, but if we have signalled for abort on that thread and try resume then it will stop the thread in proper manner.

Happy Learning
Codingsense :)

Posted in C# | Tagged: | Leave a Comment »

Rounding off to nearest in C#

Posted by codingsense on February 4, 2010

Hi,

Here I am posting a simple post but its very useful and I saw lot of questions arising on the same. So made a sample to share with you.
There are 2 types of rounding off in the following sample
1) Rounding off to nearest 10, 100, 1000 and other multiples of 10
2) Rounding off to nearest decimal place

Rounding off to nearest 10, 100, 1000 and other multiples of 10



public static double RoundToNearest(double Amount, double RoundTo)
{
double ExcessAmount = Amount % RoundTo;
if (ExcessAmount < (RoundTo / 2))
{
Amount -= ExcessAmount;
}
else            
{
Amount += (RoundTo - ExcessAmount);
}

return Amount;
}


Rounding off to nearest decimal place




public static decimal RoundToNearestDecimal(decimal Amount, int DigitsToRound)
{
return Math.Round(Amount, DigitsToRound, MidpointRounding.AwayFromZero);
}


Sample usage of the above code





Console.WriteLine("Amount = 123456789");
Console.WriteLine(RoundToNearest(12345678, 10));
Console.WriteLine(RoundToNearest(12345678, 100));
Console.WriteLine(RoundToNearest(12345678, 1000));
Console.WriteLine(RoundToNearest(12345678, 10000));
Console.WriteLine(RoundToNearest(12345678, 100000));

Console.WriteLine();

decimal deci = Convert.ToDecimal(123.456789);
Console.WriteLine("Amount = 123.456789");
Console.WriteLine(RoundToNearestDecimal(deci, 1));
Console.WriteLine(RoundToNearestDecimal(deci, 2));
Console.WriteLine(RoundToNearestDecimal(deci, 3));
Console.WriteLine(RoundToNearestDecimal(deci, 4));
Console.WriteLine(RoundToNearestDecimal(deci, 5));


Sample output for the above code

Happy Learning
Codingsense :)

Posted in C# | Tagged: , | 3 Comments »

GetDaylightChanges with TimeZoneInfo

Posted by codingsense on February 3, 2010

Hi,

A good feature given by microsoft in .Net 3.5 is adding new classes like TimezoneInfo, AdjustmentRule and TransitionTime.
Earlier we were able to get only the daylight changes of the timezone that is currently set on our machine using TimeZone.CurrentTimeZone and if we wanted other daylightchanges then we had to do lot of manipulation using Kernel.dll and access the registry values for each entry but now its readily available for us.

I had a requirement few days back to get the timezones and their next 5 years daylight start and end date and time, it just happened so easily with the given features.

The main thing that I had to implement is changing from transition time to DateTime and here is the function that I made to acheive the same.



public DateTime GetDateTime(int Year, TimeZoneInfo.TransitionTime transactionTime)
{
//Create a datetime to begin with 1st of the transition month           
DateTime dt = new DateTime(Year, transactionTime.Month,
1, transactionTime.TimeOfDay.Hour,
transactionTime.TimeOfDay.Minute, transactionTime.TimeOfDay.Second);

//If the dayofweek of 1st is same as the transition day then exit            
//otherwise             
if (dt.DayOfWeek != transactionTime.DayOfWeek)
{
//If transition dayofweek is greater than 1st dayofweek then we need to move further                
//Eg : Transition dayofweek is tuesday and 1st day of week is monday then we need to move 1 day ahead to point to                 
//the transition day                
if (dt.DayOfWeek < transactionTime.DayOfWeek)
{
dt.AddDays(transactionTime.DayOfWeek - dt.DayOfWeek);
}
else                
{
//else its not in the 1st week so we move 7 days ahead and move back again
                    dt = dt.AddDays(7 - (dt.DayOfWeek - transactionTime.DayOfWeek));
}
}

//Since we are already pointing to the first week of the transition date            
//Add remaining no of weeks to the datetime            
return dt.AddDays((transactionTime.Week - 1) * 7);
}


Sample source code 6Kb

By using the new classes we can get all the required information about the timezones accross the globe. Hope you found it useful.

Happy Learning,
Codingsense :)

Posted in C# | Tagged: | 5 Comments »

Customize a slider in WPF, Step by Step Tutorial

Posted by codingsense on February 1, 2010

Hi,

Today let us explore how to customize a slider control in WPF. I have seen a lot of explanation and looked many articles on net about the slider, but i got the the better idea about it only when I implemented it in my own way.
Let me share the same step by step method with you all.

Download Source (7.8 Kb)

So lets begin, First create a WpfApplication in VS2008 and insert a slider control in the grid layout.Open the designer and click on the XAML view. You will see the below code.

<Grid>
<Slider Name="CusomSlider" Height="25" VerticalAlignment="Top" Margin="46,65,37,0" />····
 </Grid>


Now we have to override the Style property of the slider to give it the look we want. We will name the style as MyCustomStyleForSlider and override the style method as below code,

<Slider Name="CusomSlider" Style="{StaticResource MyCustomStyleForSlider}" Height="25" VerticalAlignment="Top" Margin="46,65,37,0" />


Slider control is made up of many subcontrols, those include Track which inturn include Track.IncreaseRepeatButton, Track.DecreaseRepeatButton, Track.Thumb.
Thumb is the main sub control that makes the rectangle shape that moves left and right. The same thumb can also be found in horizontal and verticle scrollbars. So lets insert the following default template of all the controls that all together make the slider control.

<Style x:Key="MyCustomStyleForSlider" TargetType="{x:Type Slider}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Slider}">
<Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}"><Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto" MinHeight="{TemplateBinding MinHeight}"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<TickBar x:Name="TopTick" Visibility="Collapsed" Fill="{TemplateBinding Foreground}" Placement="Top" Height="4" Grid.Row="0"/>
<TickBar x:Name="BottomTick" Visibility="Collapsed" Fill="{TemplateBinding Foreground}" Placement="Bottom" Height="4" Grid.Row="0"/>
<Border x:Name="TrackBackground"  
 BorderThickness="1" CornerRadius="1"
 Margin="5,0" VerticalAlignment="Center" Height="4.0" Grid.Row="1" >
<Canvas Margin="-6,-1">
<Rectangle Visibility="Hidden" x:Name="PART_SelectionRange" Height="4.0"
 Fill="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"
 Stroke="{DynamicResource {x:Static SystemColors.ControlDarkDarkBrushKey}}"
 StrokeThickness="1.0"/>
</Canvas>
</Border>
<Track x:Name="PART_Track" Grid.Row="1">
<Track.DecreaseRepeatButton>
<RepeatButton Command="{x:Static Slider.DecreaseLarge}"/>
</Track.DecreaseRepeatButton>
<Track.IncreaseRepeatButton>
<RepeatButton Command="{x:Static Slider.IncreaseLarge}"/>
</Track.IncreaseRepeatButton>
<Track.Thumb>
<Thumb x:Name="Thumb" Background="Black"/>                                        
</Track.Thumb>
</Track>
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>


Now run the application and check how it looks and works, click on its right and left and a small dot i.e Thumb without any style moves right and left.


Now lets apply style to the thumb and name it as CustomThumbForSlider, below is the implementation.

·<Style x:Key="CustomThumbForSlider" TargetType="{x:Type Thumb}">
<Setter Property="OverridesDefaultStyle" Value="True"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Thumb}">
<Ellipse Fill="#FF8F4040" Stroke="#FF000000" Height="15" Width="15"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>


and override the above style to the thumb.

<Thumb x:Name="Thumb" Style="{StaticResource CustomThumbForSlider}" Background="Black"/>


After overriding the Thumb style lets have a look of the slider control,

Great, i.e The important thing that makes the slider control is the IncreaseRepeatButton and DecreaseRepeatButton, when clicked on ends they decrease in the size to the amount of the Tickbar value making the other button grow in size and that gives us the illusion that the thumb is moving. Nice move right ok lets get furthur.

Now we need to hide the Increase and decrease repeat buttons so lets create their styles.

<Style x:Key="SliderRepeatButtonStyle" TargetType="{x:Type RepeatButton}">
<Setter Property="OverridesDefaultStyle" Value="true"/>
<Setter Property="IsTabStop" Value="false"/>
<Setter Property="Focusable" Value="false"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type RepeatButton}">
<Rectangle Fill="Transparent"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>


Ok apply the styles to the repeat buttons and run the application, you will see that we have only the thumb that moves left and right on clicking but we dont see any track. So now we shall give border control a proper background and brush so that we get a good look at the starting and ending of the slider control. Lets create a style for both of these properties and apply them to the border.

<SolidColorBrush x:Key="HorizontalSliderTrackNormalBackground" Color="#FFE7EAEA"/>
<LinearGradientBrush x:Key="HorizontalSliderTrackNormalBorder" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFAEB1AF" Offset="0.1"/>
<GradientStop Color="White" Offset=".9"/>
</LinearGradientBrush>
<Border x:Name="TrackBackground" 
 Background="{StaticResource HorizontalSliderTrackNormalBackground}"
 BorderBrush="{StaticResource HorizontalSliderTrackNormalBorder}"                                        
 BorderThickness="1" CornerRadius="1"
 Margin="5,0" VerticalAlignment="Center" Height="4.0" Grid.Row="1" >


Now run the application, you can see that we have customized the design of our slider control.

Change the ellipse control or the border styles to whatever you desire and you will be able to create your own design for the slider control.
Change some of the properties of tickbar, thumb and repeat buttons and see how they behave, which will give you more hands on with slider controller.

References:
http://msdn.microsoft.com/en-us/library/system.windows.controls.primitives.thumb.aspx
http://msdn.microsoft.com/en-us/library/system.windows.controls.primitives.tickbar.aspx

Happy Learning,
Codingsense :)

Posted in C#, WPF | Tagged: , , , | 14 Comments »

 
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