Tried [FxCop](http://msdn.microsoft.com/en-us/library/bb429476.aspx)? It&#39;s integrated into VS as &quot;Code Analysis&quot;

In the newer versions of Visual Studio, it is called &quot;Microsoft Code Analysis&quot; and can be downloaded from the Visual Studio Marketplace: https://marketplace.visualstudio.com/items?itemName=VisualStudioPlatformTeam.MicrosoftCodeAnalysis2017

[Resharper][1] performs a fair bit of static analysis as well as doing a ton of other useful things. Since [version 8.0][3] analysis can run in command line mode. Currently I wouldn&#39;t code in C# without it.

As well as FxCop, [Gendarme][2] is another tool to look at (it is Mono&#39;s version of FxCop but they are different in approach and the errors that they actually find).


  [1]: http://www.jetbrains.com/resharper/
  [2]: http://mono-project.com/Gendarme
  [3]: http://confluence.jetbrains.com/display/ReSharper/ReSharper+8+EAP

[SonarLint](http://www.sonarlint.org/visualstudio/index.html) (free, open source) is pretty sweet!

&gt; SonarLint for Visual Studio is based on and benefits from the .NET Compiler Platform (&quot;Roslyn&quot;) and its code analysis API to provide a fully-integrated user experience in Visual Studio 2015.
SonarLint is free, open source, and available in the Visual Studio Gallery.

[Gendarme for Mono][1] is similar to FxCop

  [1]: http://mono-project.com/Gendarme

You can try .Net Reflector by Red-Gate, you can get it from [here][1]. Many useful plugins for .Net Reflector are available on CodePlex which you can get it from [here][2].


  [1]: http://www.red-gate.com/products/reflector/
  [2]: http://www.codeplex.com/reflectoraddins

This question already has an answer, but for reference...

You can try [**PVS-Studio**][1]. That&#39;s not free, but, IMHO, must have one.
Quote from their site:

&gt;PVS-Studio is a tool used to detect bugs in the source code of programs written in C, C++ and C#.
&gt;
&gt;PVS-Studio performs static code analysis and generates a report that helps a programmer find and fix bugs. PVS-Studio does a wide range of code checks; but it is especially useful to search for misprints and Copy-Paste errors.
&gt;
&gt;The analyzer is designed for developers who use Visual Studio.

  [1]: http://www.viva64.com/en/pvs-studio/

I have `IQueryable&lt;&gt;` object.

I want to Convert it into `List&lt;&gt;` with selected columns like `new { ID = s.ID, Name = s.Name }`.


Edited

Marc you are absolutely right!

but I have only access to `FindByAll()` Method (because of my architecture).

And it gives me whole object in `IQueryable&lt;&gt;`

And I have strict requirement( for creating json object for select tag) to have only `list&lt;&gt;` type with two fields.


Convert IQueryable&lt;&gt; type object to List&lt;T&gt; type?

Is there a place to find a list of the possible values for the PHP predefined constant `PHP_OS` ? I&#39;d like to use this value for a system requirements check, but need to know how different operating systems are named in this variable.

Through some searching, so far I&#39;ve compiled the following list:

 - CYGWIN_NT-5.1
 - Darwin
 - FreeBSD
 - HP-UX
 - IRIX64
 - Linux
 - NetBSD
 - OpenBSD
 - SunOS
 - Unix
 - WIN32
 - WINNT
 - Windows

If anyone has a more complete list, or knows of any additional values I&#39;d love to hear them!

Possible Values For: PHP_OS

Is there a lint-like tool for C#?  I&#39;ve got the compiler to flag warnings-as-errors, and I&#39;ve got Stylecop, but these only catch the most egregious errors.  Are there any other must-have tools (especially for newbie C#ers like me) that point out probably-dumb things I&#39;m doing?


Lint for C#

<p>Is there a lint-like tool for C#?  I've got the compiler to flag warnings-as-errors, and I've got Stylecop, but these only catch the most egregious errors.  Are there any other must-have tools (especially for newbie C#ers like me) that point out probably-dumb things I'm doing?</p>


I am just learning about computer vision and C#. It seems like two prominent image processing libraries are [OpenCV][1] and [AForge][2]. What are some of the differences of the two?

I am making a basic image editor in C# and while researching I have come across articles on both. But I don&#39;t really know why I would choose one over the other. I would like to eventually improve the app to include more advanced functions.

Thanks.


  [1]: http://opencv.willowgarage.com/wiki/
  [2]: http://code.google.com/p/aforge/

Differences between AForge and OpenCV

How can I get the available RAM or memory used by the application? 

How to get memory available or used in C#

Is there a way of getting a unique identifier of an instance?

`GetHashCode()` is the same for the two references pointing to the same instance. However, two different instances can (quite easily) get the same hash code:

    Hashtable hashCodesSeen = new Hashtable();
    LinkedList&lt;object&gt; l = new LinkedList&lt;object&gt;();
    int n = 0;
    while (true)
    {
        object o = new object();
        // Remember objects so that they don&#39;t get collected.
        // This does not make any difference though :(
        l.AddFirst(o);
        int hashCode = o.GetHashCode();
        n++;
        if (hashCodesSeen.ContainsKey(hashCode))
        {
            // Same hashCode seen twice for DIFFERENT objects (n is as low as 5322).
            Console.WriteLine(&quot;Hashcode seen twice: &quot; + n + &quot; (&quot; + hashCode + &quot;)&quot;);
            break;
        }
        hashCodesSeen.Add(hashCode, null);
    }

I&#39;m writing a debugging addin, and I need to get some kind of ID for a reference which is unique during the run of the program.

I already managed to get internal ADDRESS of the instance, which is unique until the garbage collector (GC) compacts the heap (= moves the objects = changes the addresses).

Stack&amp;nbsp;Overflow question *[Default implementation for Object.GetHashCode()][5]* might be related.

The objects are not under my control as I am accessing objects in a program being debugged using the debugger API. If I was in control of the objects, adding my own unique identifiers would be trivial.

I wanted the unique ID for building a hashtable ID -&gt; object, to be able to lookup already seen objects. For now I solved it like this:

    Build a hashtable: &#39;hashCode&#39; -&gt; (list of objects with hash code == &#39;hashCode&#39;)
    Find if object seen(o) {
        candidates = hashtable[o.GetHashCode()] // Objects with the same hashCode.
        If no candidates, the object is new
        If some candidates, compare their addresses to o.Address
            If no address is equal (the hash code was just a coincidence) -&gt; o is new
            If some address equal, o already seen
    }

   [5]: https://stackoverflow.com/questions/720177/default-implementation-for-object-gethashcode


.NET unique object identifier

I have a set of controls with attached commands and logic that are constantly reused in the same way.  I decided to create a user control that holds all the common controls and logic. 

However I also need the control to be able to hold content that can be named.  I tried the following:

&lt;!-- language: xaml --&gt;

    &lt;UserControl.ContentTemplate&gt;
        &lt;DataTemplate&gt;
            &lt;Button&gt;a reused button&lt;/Button&gt;
            &lt;ContentPresenter Content=&quot;{TemplateBinding Content}&quot;/&gt;
            &lt;Button&gt;a reused button&lt;/Button&gt;
        &lt;/DataTemplate&gt;
    &lt;/UserControl.ContentTemplate&gt;

However it seems any content placed inside the user control cannot be named.  For example if I use the control in the following way:

&lt;!-- language: xaml --&gt;

    &lt;lib:UserControl1&gt;
         &lt;Button Name=&quot;buttonName&quot;&gt;content&lt;/Button&gt;
    &lt;/lib:UserControl1&gt;

I receive the following error:

&gt; Cannot set Name attribute value &#39;buttonName&#39;
&gt; on element &#39;Button&#39;. &#39;Button&#39; is
&gt; under the scope of element
&gt; &#39;UserControl1&#39;, which already had a
&gt; name registered when it was defined in
&gt; another scope.

If I remove the buttonName, then it compiles, however I need to be able to name the content. How can I achieve this?

How to create a WPF UserControl with NAMED content

I have an XML file with a specified schema location such as this:

    xsi:schemaLocation=&quot;someurl ..\localSchemaPath.xsd&quot;

I want to validate in C#.  Visual Studio, when I open the file, validates it against the schema and lists errors perfectly.  Somehow, though, I can&#39;t seem to validate it automatically in C# without specifying the schema to validate against like so:

    XmlDocument asset = new XmlDocument();
        
    XmlTextReader schemaReader = new XmlTextReader(&quot;relativeSchemaPath&quot;);
    XmlSchema schema = XmlSchema.Read(schemaReader, SchemaValidationHandler);
        
    asset.Schemas.Add(schema);
    
    asset.Load(filename);
    asset.Validate(DocumentValidationHandler);

Shouldn&#39;t I be able to validate with the schema specified in the XML file automatically ?  What am I missing ?


Validating an XML against referenced XSD in C#

is anyone familiar with a way to get the Application pool that is associated with a process ID ?  I am using Win32_Process to query the W3WP services and return the PID now I am trying to get the app pool associated with it.


IIS Application pool PID

I have to check, if directory on disk is empty. It means, that it does not contain any folders/files. I know, that there is a simple method. We get array of FileSystemInfo&#39;s and check if count of elements equals to zero. Something like that:

	public static bool CheckFolderEmpty(string path)
	{
		if (string.IsNullOrEmpty(path))
		{
			throw new ArgumentNullException(&quot;path&quot;);
		}

		var folder = new DirectoryInfo(path);
		if (folder.Exists)
		{
			return folder.GetFileSystemInfos().Length == 0;
		}
		
		throw new DirectoryNotFoundException();
	}

This approach seems OK. BUT!! It is very, very bad from a perspective of performance. **GetFileSystemInfos()** is a very hard method. Actually, it enumerates all filesystem objects of folder, gets all their properties, creates objects, fills typed array etc. And all this just to simply check Length. That&#39;s stupid, isn&#39;t it?

I just profiled such code and determined, that ~250 calls of such method are executed in ~500ms. This is very slow and I believe, that it is possible to do it much quicker.

Any suggestions?

How to quickly check if folder is empty (.NET)?

I have a piece of code that involves multiple inserts but need to execute submitchanges method before I finish inserting in other tables so that I can aquire an Id. I have been searching through the internet and couldnt find how to create a transaction in linq to sql. I have put comments in the code where I want the transaction to take place.

        var created = false;
        try
        {
            var newCharacter = new Character();
            newCharacter.characterName = chracterName;
            newCharacter.characterLevel = 1;
            newCharacter.characterExperience = 0;
            newCharacter.userUsername = userUsername;
            newCharacter.characterClassID = ccslst[0].characterClassID;
            //Open transaction
 

                ydc.Characters.InsertOnSubmit(newCharacter);
                ydc.SubmitChanges();

                foreach (var ccs in ccslst)
                {
                    var cs = new CharacterStat();
                    cs.statId = ccs.statID;                        
                    cs.statValue = ccs.statValue;
                    cs.characterID = newCharacter.characterID;
                    ydc.CharacterStats.InsertOnSubmit(cs);
                }                    
         

                var ccblst = ydc.ClassBodies.Where(cb =&gt; cb.characterClassID == newCharacter.characterClassID);
                foreach (var ccb in ccblst)
                {
                    var charBody = new CharacterBody();
                    charBody.bodyId = ccb.bodyId;
                    charBody.bodyPartId = ccb.bodyPartId;
                    charBody.characterID = newCharacter.characterID;
                    ydc.CharacterBodies.InsertOnSubmit(charBody);
                }
                ydc.SubmitChanges();      
                created = true;
            //Commit transaction
            }
            catch (Exception ex)
            {
                created = false;
                //transaction Rollback;                    
            }
            return created;

EDIT: Forgot to mention that ydc is my datacontext

How to create a LINQ to SQL Transaction?

How do I obtain the version number of the calling web application in a referenced assembly?

I&#39;ve tried using System.Reflection.Assembly.GetCallingAssembly().GetName() but it just gives me the dynamically compiled assembly (returning a version number of 0.0.0.0).

**UPDATE: In my case I needed a solution that did not require a reference back to a class within the web application assembly.  Jason&#39;s answer below (marked as accepted) fulfils this requirement - a lot of others submitted here don&#39;t.**

Using the Web Application version number from an assembly (ASP.NET/C#)

I use log4net all the time, but one thing I&#39;ve never figured out is how to tell what&#39;s going on on the inside. For example, I&#39;ve got a console appender and a database appender in my project. I made a few changes to the database and the code, and now the database appender doesn&#39;t work anymore. I&#39;ll figure out why eventually, but it would help a lot if I could see what&#39;s going on inside log4net.

Does log4net generate any kind of output that I can view to try to determine the source of my problem?

How to track down log4net problems

Is there something similar to Pylint, that will look at a Python script (or run it), and determine which version of Python each line (or function) requires?

For example, theoretical usage:

    $ magic_tool &lt;EOF
    with something:
        pass
    EOF
    1: &#39;with&#39; statement requires Python 2.6 or greater
    
    $ magic_tool &lt;EOF
    class Something:
        @classmethod
        def blah(cls):
            pass
    EOF
    2: classmethod requires Python 2.2 or greater
    $ magic_tool &lt;EOF
    print &quot;&quot;&quot;Test
    &quot;&quot;&quot;
    EOF
    1: Triple-quote requires Python 1.5 of later

Is such a thing possible? I suppose the simplest way would be to have all Python versions on disc, run the script with each one and see what errors occur..

Tool to determine what lowest version of Python required?

I&#39;ve got a Python project using PyDev in Eclipse, and PyDev keeps generating false errors for my code.  I have a module `settings` that defines a `settings` object.  I import that in module `b` and assign an attribute with:

    from settings import settings
    settings.main = object()

In some of my code--but not all of it, statements like:

    from settings import settings
    print settings.main 

... generate &quot;Undefined variable from import: main&quot; messages in the Eclipse code error pane, even though the code runs without a problem.  How can I correct these?

How do I fix PyDev &quot;Undefined variable from import&quot; errors?

 
Can anybody tell me how to remove all CA2202 warnings from the following code?     


    public static byte[] Encrypt(string data, byte[] key, byte[] iv)
    {
        using(MemoryStream memoryStream = new MemoryStream())
        {
            using (DESCryptoServiceProvider cryptograph = new DESCryptoServiceProvider())
            {
                using (CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptograph.CreateEncryptor(key, iv), CryptoStreamMode.Write))
                {
                    using(StreamWriter streamWriter = new StreamWriter(cryptoStream))
                    {
                        streamWriter.Write(data);
                    }
                }
            }
            return memoryStream.ToArray();
        }
    }


&gt; Warning	7	CA2202 : Microsoft.Usage : Object &#39;cryptoStream&#39; can be disposed more than once in method &#39;CryptoServices.Encrypt(string, byte[], byte[])&#39;. To avoid generating a System.ObjectDisposedException you should not call Dispose more than one time on an object.: Lines: 34   
&gt;	
&gt; Warning	8	CA2202 : Microsoft.Usage : Object &#39;memoryStream&#39; can be disposed more than once in method &#39;CryptoServices.Encrypt(string, byte[], byte[])&#39;. To avoid generating a System.ObjectDisposedException you should not call Dispose more than one time on an object.: Lines: 34, 37	

You need Visual Studio Code Analysis to see these warnings (these are not c# compiler warnings).


CA2202, how to solve this case

I&#39;m writing the startup code for an embedded system -- the code that loads the initial stack pointer before jumping to the main() function -- and I need to tell it how many bytes of stack my application will use (or some larger, conservative estimate).

I&#39;ve been told the gcc compiler now has a -fstack-usage option and -fcallgraph-info option that can somehow be used to statically calculates the exact &quot;Maximum Stack Usage&quot; for me.
( [&quot;Compile-time stack requirements analysis with GCC&quot;][1] by Botcazou, Comar, and Hainque ).

Nigel Jones says that recursion is a really bad idea in embedded systems ([&quot;Computing your stack size&quot;][2] 2009), so I&#39;ve been careful not to make any mutually recursive functions in this code.

Also, I make sure that none of my interrupt handlers ever re-enable interrupts until their final return-from-interrupt instruction, so I don&#39;t need to worry about re-entrant interrupt handlers.

Without recursion or re-entrant interrupt handlers, it should possible to statically determine the maximum stack usage. (And so most of the answers to https://stackoverflow.com/questions/389219/how-to-determine-maximum-stack-usage do not apply).
My understanding is I (or preferably, some bit of code on my PC that is automatically run every time I rebuild the executable) first find the maximum stack depth for each interrupt handler when it&#39;s not interrupted by a higher-priority interrupt, and the maximum stack depth of the main() function when it is not interrupted.
Then I add them all up to find the total (worst-case) maximum stack depth. That occurs (in my embedded system) when the main() background task is at its maximum depth when it is interrupted by the lowest-priority interrupt, and that interrupt is at its maximum depth when it is interrupted by the next-lowest-priority interrupt, and so on.

I&#39;m using YAGARTO with gcc 4.6.0 to compile code for the LM3S1968 ARM Cortex-M3.

So how do I use the -fstack-usage option and -fcallgraph-info option with gcc to calculate the maximum stack depth? Or is there some better approach to determine maximum stack usage?

(See https://stackoverflow.com/questions/6375762/how-to-determine-maximum-stack-usage-in-embedded-system for almost the same question targeted to the Keil compiler .)

  [1]: https://www.adacore.com/uploads/technical-papers/Stack_Analysis.pdf
  [2]: https://embeddedgurus.com/stack-overflow/2009/03/computing-your-stack-size/

How to determine maximum stack usage in embedded system with gcc?

I use underscores for my test methods for a better readability and I want to suppress FxCop errors/warnings for the whole test namespace.

How can I achieve this? I played with `GlobalSuppressions.cs` but nothing worked:

    [module: System.Diagnostics.CodeAnalysis.SuppressMessage(
        &quot;Microsoft.Naming&quot;, &quot;CA1707:IdentifiersShouldNotContainUnderscores&quot;,
        Scope = &quot;namespace&quot;, Target = &quot;Company.Product.Tests&quot;)]

    [assembly: System.Diagnostics.CodeAnalysis.SuppressMessage(
        &quot;Microsoft.Naming&quot;, &quot;CA1707:IdentifiersShouldNotContainUnderscores&quot;,
        Scope = &quot;namespace&quot;, Target = &quot;Company.Product.Tests&quot;)]

&#39;SuppressMessage&#39; for a whole namespace

I&#39;ve been using JSLint to make me feel bad about my JavaScript. It is great, by the way. There is one check that I don&#39;t quite understand and I&#39;d like your views, please.

From [jslint.com][1]: 

&gt;In languages with block scope, it is usually recommended that variables be declared at the site of first use. But because JavaScript does not have block scope, it is wiser to declare all of a function&#39;s variables at the top of the function. **It is recommended that a single var statement be used per function.**

What is the last sentance in bold really saying? I think I should be declaring multiple variables like this?

    var foo = 1, bar = 2;

And, is the &quot;wise&quot; part just a programming style to discourage errors down the line or is there more to it than that?

Thanks for your help.


  [1]: http://www.jslint.com/lint.html#scope

One var per function in JavaScript?

**PHPLint**, **JSLint**, and I recently came across &quot;you can lint your **JS** code on the fly&quot; while reading something about some *IDE*. 

So, what *is* &quot;linting&quot;?

What is &quot;Linting&quot;?

The following JS:

    (function() {
      &quot;use strict&quot;;
  
      $(&quot;#target&quot;).click(function(){
        console.log(&quot;clicked&quot;);
      });
  
    }());

Yields:

    test.js: line 5, col 3, &#39;$&#39; is not defined.

When linted using JSHint 0.5.5.  Any ideas?

JSHint and jQuery: &#39;$&#39; is not defined

I have a **System app** that uses system permissions and I have those permissions listed in the manifest. Eclipse gives the following **error** when I try to make a build(command line build works):

&gt;   Permission is only granted to system apps


I&#39;m already aware that my app requires system permissions and it is not a problem for me because my application will be used only on rooted phones. So I want to suppress this error, anyone knows how?

**EDIT**  
My project already compiles fine on command line, installs, runs etc.. My problem is about eclipse giving an error for a legit manifest file.

Permission is only granted to system app

Recently I&#39;ve seen appeared a lint error in my code:

&gt; Should pass resolved color instead of resource id here:
&gt; getResources().getColor(R.color.maps_list_background_color)	
&gt; MyClass.java	/myapp/android/maps	line 107	Android Lint Problem

I know how to resolve it the answer is in the error, the thing is I don&#39;t get why they have added this error in the linter. 



Content Type	Original Author	Original Content on Stackoverflow
Question	Ken	View Question on Stackoverflow
Solution 1 - C#	mmx	View Answer on Stackoverflow
Solution 2 - C#	Kris Erickson	View Answer on Stackoverflow
Solution 3 - C#	Mrchief	View Answer on Stackoverflow
Solution 4 - C#	Nathan Koop	View Answer on Stackoverflow
Solution 5 - C#	this. __curious_geek	View Answer on Stackoverflow
Solution 6 - C#	dimhotepus	View Answer on Stackoverflow

Lint for C#

C# Problem Overview

C# Solutions

Solution 1 - C#

Solution 2 - C#

Solution 3 - C#

Solution 4 - C#

Solution 5 - C#

Solution 6 - C#

Possible Values For: PHP_OS

Convert IQueryable<> type object to List<T> type?

Attributions