No, it is not possible. The assemblies need to have the same publicKeyToken.

The bindingRedirect tag only has the oldVersion and newVersion attributes, so there&#39;s no way to tell it about the &quot;null&quot; version anyway.

But the real reason behind is explained due to the [strong name mechanism][1]


  [1]: https://social.msdn.microsoft.com/Forums/vstudio/en-US/9b9a1388-fdb7-413b-af2e-9676ba3b4760/can-dependentassembly-work-with-change-to-publickeytoken?forum=netfxbcl

You might be able to use the [AppDomain.AssemblyResolve][1] event to do that. I&#39;ve included some sample code in [this answer][2].


  [1]: http://msdn.microsoft.com/en-us/library/system.appdomain.assemblyresolve.aspx
  [2]: https://stackoverflow.com/questions/1460271/how-to-use-assembly-binding-redirection-to-ignore-revision-and-build-numbers/2344624#2344624

It does seem that a binding-redirect can&#39;t be used, but in my case I did manage to get around the problem with differing publicKeyTokens by amending the token-value being requested in the referencing DLL:


Disassemble the dll to IL, change reference, reassemble (and re-sign - which might be an issue if you don&#39;t have the keyfile).

(See my comment on https://stackoverflow.com/questions/12346293/when-referencing-assemblies-is-it-possible-to-insist-on-a-version-number-but-ig )


 

I have written some stylesheets - including a print.css - and it&#39;s working fine. 

I&#39;d like to remove the URL from printing out on each of the pages. I am beginning to wonder if it is impossible. Is there an element/option that I can set to display:none to do this?

The reason is that the specific pages that have a &#39;normal&#39; and &#39;print&#39; stylesheet have been specially formatted so when printed, it forms a meaningful booklet. Therefore the URL is irrelevant.

Can I remove the URL from my print css, so the web address doesn&#39;t print?

I am having a problem generating a GUID for a string - for example:

    Guid g = New Guid(&quot;Mehar&quot;);

How can I compute a GUID for `&quot;Mehar&quot;`?  I am getting an exception.

How can I generate a GUID for a string?

Is it possible to perform an assembly binding redirect between different versions of a referenced assembly if the public key token is null on the older version and set on the newer version?

For example, I have two assemblies...

    System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null

and

    System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35

Should the following assembly binding redirect work in the Asp.Net web.config...

    &lt;runtime&gt;
      &lt;assemblyBinding xmlns=&quot;urn:schemas-microsoft-com:asm.v1&quot;&gt;
        &lt;dependentAssembly&gt;
          &lt;assemblyIdentity name=&quot;System.Web.Mvc&quot; publicKeyToken=&quot;31bf3856ad364e35&quot;/&gt;
          &lt;bindingRedirect oldVersion=&quot;1.0.0.0&quot; newVersion=&quot;2.0.0.0&quot;/&gt;
        &lt;/dependentAssembly&gt;
      &lt;/assemblyBinding&gt;
    &lt;/runtime&gt;



.Net Assembly Binding Redirect with Differing Public Key Tokens

Is it possible to perform an assembly binding redirect between different versions of a referenced assembly if the public key token is null on the older version and set on the newer version?
For example, I have two assemblies...
<pre><code class="hljs language-ini">System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
</code></pre>
and
<pre><code class="hljs language-ini">System.Web.Mvc, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35
</code></pre>
Should the following assembly binding redirect work in the Asp.Net web.config...
<pre><code class="hljs language-php-template">&#x3C;runtime>
 &#x3C;assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
 &#x3C;dependentAssembly>
 &#x3C;assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35"/>
 &#x3C;bindingRedirect oldVersion="1.0.0.0" newVersion="2.0.0.0"/>
 &#x3C;/dependentAssembly>
 &#x3C;/assemblyBinding>
&#x3C;/runtime>
</code></pre>

I have gone through many articles but I am still not clear about the difference between the normal delegates that we usually create and multicast delegates.

    public delegate void MyMethodHandler(object sender);
    MyMethodHandler handler = new MyMethodHandler(Method1);
    handler += Method2;
    handler(someObject);

The above delegate MyMethodHandler will call these two methods.
Now where does multicast delegates come in. I have read that they can call multiple methods but I am afraid that my basic understanding about delegates is not correct. 

Simple Delegate (delegate) vs. Multicast delegates

I am trying to convert my string formatted value to date type with format `dd/MM/yyyy`.

    this.Text=&quot;22/11/2009&quot;;
    
    DateTime date = DateTime.Parse(this.Text);

What is the problem ?
It has a second override which asks for `IFormatProvider`. What is this? *Do* I need to pass this also? If Yes how to use it for this case?

**Edit** 

What are the differences between `Parse` and `ParseExact`?

**Edit 2**

Both answers of Slaks and Sam are working for me, currently user is giving the input but this will be assured by me that they are valid by using maskTextbox.

Which answer is better considering all aspects like type saftey, performance or something you feel like

String was not recognized as a valid DateTime &quot; format dd/MM/yyyy&quot;

So I ran into a situation today where some production code was failing precisely because a method performed exactly as [documented in MSDN][1].  Shame on me for not reading the documentation.  However, I&#39;m still scratching my head as to *why* it behaves this way, even if &quot;by design&quot;, since this behavior is exactly opposite what I would have expected (and other, known behaviors) and therefore seems to violate the principle of least surprise.

The &lt;code&gt;All()&lt;/code&gt; method allows you to supply a predicate (such as a lambda expression) to test an &lt;code&gt;IQueryable&lt;/code&gt;, returning a Boolean value that indicates whether all collection members match the test.  So far so good.  Here&#39;s where it gets weird.  &lt;code&gt;All()&lt;/code&gt; also returns &lt;code&gt;true&lt;/code&gt; if the collection is empty.  This seems completely backwards to me, for the following reasons:

 * If the collection is empty, a test like this is, at best, undefined.  If my driveway is empty, I cannot assert that all cars parked there are red.  With this behavior, on an empty driveway all cars parked there are red AND blue AND checkerboard - all of these expressions would return true.
 * For anyone familiar with the SQL notion that NULL != NULL, this is unexpected behavior.
 * The &lt;code&gt;Any()&lt;/code&gt; method behaves as expected, and (correctly) returns false because it does not have any members that match the predicate.

So my question is, why does &lt;code&gt;All()&lt;/code&gt; behave this way?  What problem does it solve?  Does this violate the principle of least surprise?

I tagged this question as .NET 3.5, though the behavior also applies to .NET 4.0 as well.

**EDIT**  Ok, so I grasp the logic aspect to this, as so excellently laid out by Jason and the rest of you.  Admittedly, an empty collection is something of an edge case.  I guess my question is rooted in the struggle that, just because something is *logical* doesn&#39;t mean it necessarily makes *sense* if you&#39;re not in the correct frame of mind.

  [1]: http://msdn.microsoft.com/en-us/library/bb534754.aspx

Why does IQueryable.All() return true on an empty collection?

I am trying to produce a simple scripting system that will be used to print labels. I have done this in the past with reflection with no problem, but I am now trying to do it with Lambda functions so that I can cache the functions for reuse.

The code I have so far is as follows...

    public static string GetValue&lt;T&gt;(T source, string propertyPath) {
    
    	try {
    
    		Func&lt;T, Object&gt; func;
    
    		Type type = typeof(T);
    		ParameterExpression parameterExpression = Expression.Parameter(type, @&quot;source&quot;);
    		Expression expression = parameterExpression;
    		foreach (string property in propertyPath.Split(&#39;.&#39;)) {
    			PropertyInfo propertyInfo = type.GetProperty(property);
    			expression = Expression.Property(expression, propertyInfo);
    			type = propertyInfo.PropertyType;
    		}
    
    		func = Expression.Lambda&lt;Func&lt;T, Object&gt;&gt;(expression, parameterExpression).Compile();
    
    		object value = func.Invoke(source);
    		if (value == null)
    			return string.Empty;
    		return value.ToString();
    
    	}
    	catch {
    
    		return propertyPath;
    
    	}
    
    }

This seems to work in some cases, but in others it fails. The problem seems to be in my trying to return the values as objects - irrespective of the actual data types. I am trying to do this because I do not know at compile time what the data type will be but in the long run, I only need a string.

I am getting the exception shown in the title of this message whenever I try to access a property of type Int32 - but I am also getting it for Nullable&lt;DateTime&gt; types and others.
 The exception is thrown when I try to compile the expression into the function.

Can anybody suggest how I might go about this differently whilst maintaining the Lambda functionality so that I can cache the accessors?


Expression of type &#39;System.Int32&#39; cannot be used for return type &#39;System.Object&#39;

I get a BindingFailure on a line of code using the XmlSerializer:

    XmlSerializer s = new XmlSerializer(typeof(CustomXMLSerializeObject));

&gt; The assembly with display name CustomXMLSerializeObject.XmlSerializers&#39; failed to load in the &#39;LoadFrom&#39; binding context of the AppDomain with ID 1. The cause of the failure was: System.IO.FileNotFoundException: Could not load file or assembly XMLSerializeObject.XmlSerializers, Version=1.4.0.0, Culture=neutral, PublicKeyToken=null&#39; or one of its dependencies. The system cannot find the file specified.

The error is quite long and goes on to explain pre-bind state information and the places it looked to try and find the file.

The custom object I am trying to desrialize is relatively simple - just a bunch of private integers and strings that have public accessors.  I do have a private variable that is another custom serializeable class but that one has nothing but private strings with public accessors in it.

The awkward part?  This only happens when I deserialize.  That line of code runs fine when I serialize the object.  It works fine and the object gets deserialized and populated perfectly.  Don&#39;t really notice any loss of performance or long loading time.

What exactly is this warning (not an error or exception, program runs fine afterwards)?  Why does it happen?  How do I prevent it without simply disabling the warning?

C# XmlSerializer BindingFailure

MSDN Code Sample Description: The following code example uses the IsAuthenticated property to determine whether the current request has been authenticated. If it has not been authenticated, the request is redirected to another page where users can enter their credentials into the Web application. This is a common technique used in the default page for an application.

This is great but no detail or anything...

What exactly is it checking for? How do I set it to true?

Go the extra mile: Where would I find more detailed documentation about this?

How does Request.IsAuthenticated work?

I have to build a small webapp for a company to maintain their business data...  Only those within the company will be using it, but we are planning to host it in public domain, so that the employees can connect to app from various locations. (Till now I have built web apps that are hosted internally only)

I&#39;m wondering whether I need to use a secured connection (https) or just the forms authentication is enough.

If you say https, I have some questions :

1.  What should I do to prepare my website for https.  (Do I need to alter the code / Config)
2.  Is SSL and https one and the same...
3.  Do I need to apply with someone to get some license or something.
4.  Do I need to make all my pages secured or only the login page...

I was searching Internet for answer, but I was not able to get all these points... Any whitepaper or other references would also be helpful...

Feel free to ask incase you need more information.

Thanks

- Raja




How to make a website secured with https

I need to separate IE and FF browsers from others

it&#39;s a pseudo-code :

    If (CurrentBrowser == IE(6+) or FF(2+) )
    {
    ...
    }
    else 
    {
    ...
    }

in `protected void Page_Load()` event (think so)

    if ((Request.Browser.Type == &quot;IE&quot;) || (Request.Browser.Type == &quot;FF&quot;))
    {
        WebMsgBox.Show(&quot;1111&quot;);
    }

no effects :-/ what is IE and FF types?

Browser detection

Is there a Page.Refresh type of command to refresh a page?

I don&#39;t want to redirect to the page or refresh in JavaScript.


Refresh Page C# ASP.NET

How do I get number of Files from a folder using ASP.NET with C#?


File count from a folder

I&#39;ve noticed this section in my web.config files for a while and I&#39;m now trying to reason out what exactly the purpose is:

      &lt;runtime&gt;
        &lt;assemblyBinding xmlns=&quot;urn:schemas-microsoft-com:asm.v1&quot;&gt;
          &lt;dependentAssembly&gt;
            &lt;assemblyIdentity name=&quot;System.Web.Helpers&quot; publicKeyToken=&quot;31bf3856ad364e35&quot; /&gt;
            &lt;bindingRedirect oldVersion=&quot;1.0.0.0-2.0.0.0&quot; newVersion=&quot;2.0.0.0&quot; /&gt;
          &lt;/dependentAssembly&gt;
          &lt;dependentAssembly&gt;
            &lt;assemblyIdentity name=&quot;System.Web.Mvc&quot; publicKeyToken=&quot;31bf3856ad364e35&quot; /&gt;
            &lt;bindingRedirect oldVersion=&quot;0.0.0.0-4.0.0.0&quot; newVersion=&quot;4.0.0.0&quot; /&gt;
          &lt;/dependentAssembly&gt;
          &lt;dependentAssembly&gt;
            &lt;assemblyIdentity name=&quot;System.Web.WebPages&quot; publicKeyToken=&quot;31bf3856ad364e35&quot; /&gt;
            &lt;bindingRedirect oldVersion=&quot;1.0.0.0-2.0.0.0&quot; newVersion=&quot;2.0.0.0&quot; /&gt;
          &lt;/dependentAssembly&gt;
        &lt;/assemblyBinding&gt;
      &lt;/runtime&gt;

So, the first entry seems to say:

&gt; System.Web.Helpers is the name of a dependent assembly with a public
&gt; key token of `31bf3856ad364e35`. Redirect version 1.0.0.0 through
&gt; 2.0.0.0 to version 2.0.0.0.

My best guess is that it means any code executing in the context of the ASP.NET run time that depends on an assembly with the specified name which also has a version in the specified range executes as if it were compiled with the specified version with the specified public key.

Does this mean if I have a web project that depends on a class library and that class library has a reference to an older version of the assembly which has a a bindingRedirect, that the code will execute as if it were compiled against the newer version?


What is the meaning/reason for the generated entries in web.config&gt;configuration&gt;runtime&gt;assemblyBinding?

I&#39;m getting, &quot;Could not load file or assembly &#39;Bla&#39; or one of its dependencies. An attempt was made to load a program with an incorrect format.&quot;

A portion of the detailed info says:

*&quot;WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].&quot;*

So, thinking this may give me some insight in why I&#39;m getting the error above (maybe the next YSOD would contain more explicit information about exactly why it&#39;s failing), I navigated to that location in the registry, but there is no such key that I can see. What it does have is:

    \Fusion	
    	(Default)	value not set
    	\GACChangeNotification
    	\NativeImagesIndex
    	\PublisherPolicy

What am I missing?

How can I enable Assembly binding logging?

We have an asp.net 4.0 project which uses a couple of frameworks which is dependent on log4net version 1.2.10.0. Today I tried to include a new framework which is dependent on log4net version 1.2.11.0, I&#39;ve been stuck ever since: 

log4net 1.2.10.0 has publickeytoken = 1b44e1d426115821

log4net 1.2.11.0 has publickeytoken = 669e0ddf0bb1aa2a

Since these are different i cannot use either assembly redirects (to make all frameworks use the same version of log4net) or codebase (to have just the new framework use version 1.2.11.0) through the runtime element in web.config. 

What are my options here ?

(and why the bleep does log4net keep changing publickeytokens between versions, as I understand it a lost key was the reason for the switch between version 1.2.9.0 and 1.2.10.0, did they lose the key yet again? I&#39;ll volunteer my dropbox to keep it safe if they need it...)

Edit: Ok, so the log4net guys apparently had the idea that releasing with two keys was a good idea, but that means that *every* framework you make use of needs to agree on *which* of the two flavors they prefer, or those frameworks cannot work side by side in the same appdomain. Am I the only one finding this a horrible idea? if everyone did this then everything would break down, right?

Edit2: As I stated, I&#39;m not using log4net in my business code, but I use several frameworks which depend on 1.2.10.0, and the problem arose when I tried to use a new framework which depended on 1.2.11.0 (new key), so Stefans answer doesn&#39;t apply, because the new framework will expect the new key, not the old one 

Content Type	Original Author	Original Content on Stackoverflow
Question	Russell Giddings	View Question on Stackoverflow
Solution 1 - .Net	Mark Worth	View Answer on Stackoverflow
Solution 2 - .Net	Don Kirkby	View Answer on Stackoverflow
Solution 3 - .Net	mwardm	View Answer on Stackoverflow

.Net Assembly Binding Redirect with Differing Public Key Tokens

.Net Problem Overview

.Net Solutions

Solution 1 - .Net

Solution 2 - .Net

Solution 3 - .Net

How can I generate a GUID for a string?

Can I remove the URL from my print css, so the web address doesn't print?

Attributions