According to [File.Delete&#39;s documentation,][1], you&#39;ll have to strip the read-only attribute. You can set the file&#39;s attributes using [File.SetAttributes()][2].


  [1]: http://msdn.microsoft.com/en-us/library/system.io.file.delete.aspx
  [2]: http://msdn.microsoft.com/en-us/library/system.io.file.setattributes.aspx

    using System.IO;
    
    File.SetAttributes(filePath, FileAttributes.Normal);
    File.Delete(filePath);

According to [File.Delete&#39;s documentation,][1], you&#39;ll have to strip the read-only attribute. You can set the file&#39;s attributes using [File.SetAttributes()][2].


  [1]: http://msdn.microsoft.com/en-us/library/system.io.file.delete.aspx
  [2]: http://msdn.microsoft.com/en-us/library/system.io.file.setattributes.aspx

The equivalent if you happen to be working with a `FileInfo` object is:

    file.IsReadOnly = false;
    file.Delete();

Why do you need to check?  Just forcibly clear the read-only flag and delete the file.

Hm, I think I&#39;d rather put

    &gt;del /F *

into a sheduled task. Maybe wrapped by a batch file for logging statistics.

Am I missing something?

I have a .NET assembly that (for reasons outside my control) *must* be in the GAC. However, the same assembly is used by another program, which has a its own copy of an older version of the same assembly. It must use its own copy and not whatever is in the GAC. Proper versioning is probably more hassle than it&#39;s worth in this case, for reasons I won&#39;t go into. My questions is: **is there anyway to tell .NET: just use THIS DLL, right here in this directory - ignore whatever you find in the GAC or anywhere else**.

How can I force .NET to use a local copy of an assembly that&#39;s in the GAC

We&#39;re using Perforce and Visual Studio. Whenever we create a branch, some projects will not be bound to source control unless we use &quot;Open from Source Control&quot;, but other projects work regardless. From my investigations, I know some of the things involved:

In our .csproj files, there are these settings:

* &amp;lt;SccProjectName&gt;
* &amp;lt;SccLocalPath&gt;
* &amp;lt;SccAuxPath&gt;
* &amp;lt;SccProvider&gt;

Sometimes they are all set to &quot;SAK&quot;, sometimes not. It seems things are more likely to work if these say &quot;SAK&quot;.

In our .sln file, there are settings for many of the projects:

* SccLocalPath#
* SccProjectFilePathRelativizedFromConnection#
* SccProjectUniqueName#

(The # is a number that identifies each project.) SccLocalPath is a path relative to the solution file. Often it is &quot;.&quot;, sometimes it is the folder that the project is in, and sometimes it is &quot;..&quot; or &quot;..\\..&quot;, and it seems to be bad for it to point to a folder above the solution folder. The relativized one is a path *from* that folder to the project file. It will be missing entirely if SccLocalPath points to the project&#39;s folder. If the SccLocalPath has &quot;..&quot; in it, this path might include folder names that are not the same between branches, which I think causes problems.

So, to finally get to the specifics I&#39;d like to know:

* What happens when you do &quot;Change source control&quot; and bind projects? How does Visual Studio decide what to put in the project and solution files?
* What happens when you do &quot;Open from source control&quot;?
* What&#39;s this &quot;connection&quot; folder that SccLocalPath and SccProjectFilePathRelativizedFromConnection refer to? How does Visual Studio/Perforce pick it?
* Is there some recommended way to make the source control bindings continue to work even when you create a new branch of the solution?

---

*Added June 2012:*
I don&#39;t use Perforce any more, so I can&#39;t vouch for it, but have a look at &lt;a href=&quot;https://stackoverflow.com/a/11148342/2283&quot;&gt;KCD&#39;s answer&lt;/a&gt; below. Apparently there&#39;s &lt;a href=&quot;http://forums.perforce.com/index.php?/topic/1585-new-perforce-plugin-for-visual-studio-20121-beta-available-now/&quot;&gt;a new P4 VS plugin&lt;/a&gt; under development. Hopefully it should clear up all this mess!

How does Visual Studio&#39;s source control integration work with Perforce?

I&#39;ve got a junk directory where I toss downloads, one-off projects, email drafts, and other various things that might be useful for a few days but don&#39;t need to be saved forever.  To stop this directory from taking over my machine, I wrote a program that will delete all files older than a specified number of days and logs some statistics about the number of files deleted and their size just for fun.

I noticed that a few project folders were living way longer than they should, so I started to investigate.  In particular, it seemed that folders for projects in which I had used SVN were sticking around.  It turns out that the read-only files in the .svn directories are not being deleted.  I just did a simple test on a read-only file and discovered that &lt;code&gt;System.IO.File.Delete&lt;/code&gt; and &lt;code&gt;System.IO.FileInfo.Delete&lt;/code&gt; will not delete a read-only file.

I don&#39;t care about protecting files in this particular directory; if something important is in there it&#39;s in the wrong place.  Is there a .NET class that can delete read-only files, or am I going to have to check for read-only attributes and strip them?

How do I delete a read-only file?

I've got a junk directory where I toss downloads, one-off projects, email drafts, and other various things that might be useful for a few days but don't need to be saved forever. To stop this directory from taking over my machine, I wrote a program that will delete all files older than a specified number of days and logs some statistics about the number of files deleted and their size just for fun.
I noticed that a few project folders were living way longer than they should, so I started to investigate. In particular, it seemed that folders for projects in which I had used SVN were sticking around. It turns out that the read-only files in the .svn directories are not being deleted. I just did a simple test on a read-only file and discovered that <code>System.IO.File.Delete</code> and <code>System.IO.FileInfo.Delete</code> will not delete a read-only file.
I don't care about protecting files in this particular directory; if something important is in there it's in the wrong place. Is there a .NET class that can delete read-only files, or am I going to have to check for read-only attributes and strip them?

Basically, I would like to check if I have rights to open the file before I actually try to open it; I do not want to use a try/catch for this check unless I have to. Is there a file access property I can check before hand?


how can you easily check if access is denied for a file in .NET?

How do I tell if my application (compiled in Visual&amp;nbsp;Studio&amp;nbsp;2008 as *Any CPU*) is running as a 32-bit or 64-bit application?


How do I tell if my application is running as a 32-bit or 64-bit application?

The title is kind of obscure. What I want to know is if this is possible:

    string typeName = &lt;read type name from somwhere&gt;;
    Type myType = Type.GetType(typeName);
    
    MyGenericClass&lt;myType&gt; myGenericClass = new MyGenericClass&lt;myType&gt;();


Obviously, MyGenericClass is described as:

    public class MyGenericClass&lt;T&gt;

Right now, the compiler complains that &#39;The type or namespace &#39;myType&#39; could not be found.&quot; There has got to be a way to do this.

Pass An Instantiated System.Type as a Type Parameter for a Generic Class

I just realized that in some place in my code I have the return statement inside the lock and sometime outside. Which one is the best?

1)

    void example()
    {
        lock (mutex)
        {
        //...
        }
        return myData;
    }

2)

    void example()
    {
        lock (mutex)
        {
        //...
        return myData;
        }
        
    }

Which one should I use?

Should a return statement be inside or outside a lock?

In Visual Studio, I can select the &quot;Treat warnings as errors&quot; option to prevent my code from compiling if there are any warnings. Our team uses this option, but there are two warnings we would like to keep as warnings. 

There is an option to suppress warnings, but we DO want them to show up as warnings, so that won&#39;t work.

It appears that the only way to get the behavior we want is to enter a list of every C# warning number into the &quot;Specific warnings&quot; text box, except for the two we want treated as warnings.

Besides the maintenance headache, the biggest disadvantage to this approach is that a few warnings do not have numbers, so they can&#39;t be referenced explicitly. For example, &quot;Could not resolve this reference. Could not locate assembly &#39;Data....&#39;&quot;

Does anyone know of a better way to do this?

---

Clarifying for those who don&#39;t see immediately why this is useful. Think about how most warnings work. They tell you something is a little off in the code you just wrote. It takes about 10 seconds to fix them, and that keeps the code base cleaner.

The &quot;Obsolete&quot; warning is very different from this. Sometimes fixing it means just consuming a new method signature. But if an entire class is obsolete, and you have usage of it scattered through hundreds of thousands of lines of code, it could take weeks or more to fix. You don&#39;t want the build to be broken for that long, but you definitely DO want to see a warning about it. This isn&#39;t just a hypothetical case--this has happened to us.

Literal &quot;#warning&quot; warnings are also unique. I often *want* to check it in, but I don&#39;t want to break the build.

&quot;Treat all warnings as errors except...&quot; in Visual Studio

I&#39;m writing code to do Xml serialization. With below function.

    public static string SerializeToXml(object obj)
    {
        XmlSerializer serializer = new XmlSerializer(obj.GetType());
        using (StringWriter writer = new StringWriter())
        {
            serializer.Serialize(writer, obj);
            return writer.ToString();
        }
    }

If the argument is a instance of class without parameterless constructor, it will throw a exception.

&gt; Unhandled Exception:
&gt; System.InvalidOperationException:
&gt; CSharpConsole.Foo cannot be serialized
&gt; because it does not have a
&gt; parameterless constructor.    at
&gt; System.Xml.Serialization.TypeDesc.CheckSupported()
&gt; at
&gt; System.Xml.Serialization.TypeScope.GetTypeDesc(Type
&gt; type, MemberInfo sourc e, Boolean
&gt; directReference, Boolean throwOnError)
&gt; at
&gt; System.Xml.Serialization.ModelScope.GetTypeModel(Type
&gt; type, Boolean direct Reference)    at
&gt; System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(Type
&gt; type , XmlRootAttribute root, String
&gt; defaultNamespace)    at
&gt; System.Xml.Serialization.XmlSerializer..ctor(Type
&gt; type, String defaultName space)    at
&gt; System.Xml.Serialization.XmlSerializer..ctor(Type
&gt; type)


Why must there be a parameterless constructor in order to allow xml serialization to succeed?


EDIT: thanks for cfeduke&#39;s answer. The parameterless constructor can be private or internal.



Why XML-Serializable class need a parameterless constructor

I have read the answers for [What&#39;s the best way to check if a file exists in C? (cross platform)](https://stackoverflow.com/questions/230062/whats-the-best-way-to-check-if-a-file-exists-in-c-cross-platform), but I&#39;m wondering if there is a better way to do this using standard c++ libs? Preferably without trying to open the file at all. 

Both `stat` and `access` are pretty much ungoogleable. What should I `#include` to use these?


What’s the best way to check if a file exists in C++? (cross platform)

I have to read a binary file in a legacy format with Java. 

In a nutshell the file has a header consisting of several integers, bytes and fixed-length char arrays, followed by a list of records which also consist of integers and chars.

In any other language I would create `struct`s (C/C++) or `record`s (Pascal/Delphi) which  are byte-by-byte representations of the header and the record. Then I&#39;d read `sizeof(header)` bytes into a header variable and do the same for the records.

Something like this: (Delphi)

    type
      THeader = record
        Version: Integer;
        Type: Byte;
        BeginOfData: Integer;
        ID: array[0..15] of Char;
      end;

    ...

    procedure ReadData(S: TStream);
    var
      Header: THeader;
    begin
      S.ReadBuffer(Header, SizeOf(THeader));
      ...
    end;

What is the best way to do something similar with Java? Do I have to read every single value on its own or is there any other way to do this kind of &quot;block-read&quot;?

Best way to read structured binary files with Java

Is there a way to find the size of a file object that is currently open?

Specifically, I am working with the tarfile module to create tarfiles, but I don&#39;t want my tarfile to exceed a certain size.  As far as I know, tarfile objects are file-like objects, so I imagine a generic solution would work.

Size of an open file object

Is there a standard Java library that handles common file operations such as moving/copying files/folders?

Move / Copy File Operations in Java

I am getting an &#39;access is denied&#39; error when I attempt to delete a folder that is not empty. I used the following command in my attempt: `os.remove(&quot;/folder_name&quot;)`. 

What is the most effective way of removing/deleting a folder/directory that is not empty?

Content Type	Original Author	Original Content on Stackoverflow
Question	OwenP	View Question on Stackoverflow
Solution 1 - C#	Gulzar Nazim	View Answer on Stackoverflow
Solution 2 - C#	Tim Stewart	View Answer on Stackoverflow
Solution 3 - C#	Neil	View Answer on Stackoverflow
Solution 4 - C#	Adam Liss	View Answer on Stackoverflow
Solution 5 - C#	mkoeller	View Answer on Stackoverflow

How do I delete a read-only file?

C# Problem Overview

C# Solutions

Solution 1 - C#

Solution 2 - C#

Solution 3 - C#

Solution 4 - C#

Solution 5 - C#

How does Visual Studio's source control integration work with Perforce?

How can I force .NET to use a local copy of an assembly that's in the GAC

Attributions