All Questions
193
questions
184
votes
19
answers
92k
views
Cleaner way to do a null check in C#? [duplicate]
Suppose, I have this interface,
interface IContact
{
IAddress address { get; set; }
}
interface IAddress
{
string city { get; set; }
}
class Person : IPerson
{
public IContact contact { ...
88
votes
6
answers
138k
views
Is it possible to run a .NET 4.5 app on XP?
First, I have read the following:
Connect case
VS case
and especially this channel9 post
So, from the last bullet, I really think there is no way around this, but I had to see if I could get a ...
- 66.7k
87
votes
5
answers
182k
views
Differences between .NET 4.0 and .NET 4.5 in High level in .NET
Eager to know Differences between .NET 4.0 and .NET 4.5 in High level in .NET and also differences in ASP.NET, C# also in these frameworks
- 5,678
69
votes
2
answers
45k
views
Does C# 7.0 work for .NET 4.5?
I created a project in Visual Studio 2017 RC to check whether I can use new C# 7.0 language features in a .NET Framework 4.5 project. It seems to me that after referencing System.ValueTuple NuGet, new ...
- 4,831
66
votes
10
answers
120k
views
Is that possible to send HttpWebRequest using TLS1.2 on .NET 4.0 framework
My application connects to Experian server and Experian will soon stop supporting TLS 1.0 and TLS 1.1. All connectivity using HTTPS must use TLS Version 1.2.
I want to do some research on that issue ...
- 2,098
35
votes
3
answers
21k
views
Does .net 4.5 work side by side with .net 4.0?
I am interested in installing the .NET 4.5.
But I have heard that it is an In-Place upgrade.
Since the users at my company uses Windows XP. I can't release any client side apps that use .NET 4.5.
I ...
- 80.2k
26
votes
6
answers
5k
views
Behaviour of List<T>.Sort in .NET 4.5 changed from .NET 4.0?
I have the following test inside a project targeting .NET 4.0:
[TestFixture]
public class Donkey
{
[Test]
public void TestListSorting()
{
var expected = new[]
{...
- 7,075
20
votes
1
answer
6k
views
How to access a security critical field from an anonymous delegate or lambda?
Scenario
Let's say we've the next code:
[SecuritySafeCritical]
public void SomeMethod()
{
SomeCriticalClass critical = new SomeCriticalClass();
Action someDelegate = () =>
{
...
- 64.5k
19
votes
3
answers
17k
views
Timeout.InfiniteTimespan in .Net 4.0?
I actually do know that Timeout.InfiniteTimespan does not exist in .NET 4.0.
Noticed, there's also Timeout.Infinite which does exist in .NET 4.0
I am calling those two methods:
// the Change-Method
...
- 3,644
17
votes
3
answers
14k
views
Why does Task.Delay() allow an infinite delay?
After my application froze I tracked down the cause to a thread waiting on a task created by Task.Delay() (or TaskEx.Delay() in .NET 4.0) for which it provided a computed TimeSpan that, due to a bug, ...
- 16k
16
votes
3
answers
7k
views
.NET 4 equivalent of Task.WhenAll()
In .NET 4, is there any functional equivalent to .NET 4.5's System.Threading.Tasks.Task.WhenAll()?
The goal is to wrap up multiple async tasks into a single one that is completed when all of its ...
- 26.4k
16
votes
5
answers
35k
views
visual studio 2013 on windows xp
Is it possible to run Visual Studio 2013 on Windows XP?
I heard that it is not possible to install .NET Framework 4.5 on Windows XP. What if I want to use Visual Studio 2013 for .NET 4.0 on Windows ...
- 1,793
15
votes
1
answer
9k
views
Loading an assembly targeted for .NET 4.5 on a .NET 4.0 app domain
Assuming the system has .NET 4.0 and .NET 4.5 installed.
Is it possible to load and work with a .NET 4.5 assembly from an assembly written targeting .NET 4.0?
Simply put, can I call Assembly.Load ...
- 7,238
14
votes
2
answers
14k
views
Supported runtime v4.0 in app.config after upgrading VS11 Beta to VS2012 RC
After upgrading from VS11 Beta to VS2012 RC - I've modified from targeting .NET 4.0 to .NET 4.5. I notice in app.config following section
<startup>
<supportedRuntime version="v4.0" sku="....
- 1,919
14
votes
2
answers
9k
views
Does installing .NET 4.5 REALLY replace .NET 4.0 assemblies?
I am now officially confused. The MSDN article on installing the .NET 4.5 framework states the following:
"The .NET Framework 4.5 replaces the .NET Framework 4. When you install the .NET Framework 4....
- 486
13
votes
3
answers
4k
views
Delay property on Binding from .Net 4.5 in .Net 4.0
How can I implement Delay property from .Net 4.5 (described here) on binding in .Net 4.0?
I know I cannot inherit from BindingBase as ProvideValue is sealed.
I could implement MarkupExtension but ...
- 2,667
13
votes
5
answers
11k
views
Targeting .NET Framework 4 when Framework 4.5 is installed
I have VS2010 and VS2012 installed on my computer and had the .NET Framework 4.0 which I then upgraded to .NET Framework 4.5. However, I am still developing apps that need to work on .NET Framework 4....
- 169
12
votes
4
answers
2k
views
What .NET 4.5 (or earlier) higher-level constructs make Threading easier?
Delegates are a few of the objects that make threading easier in .NET reference. They can be used to asynchronously invoke a method. What other objects exist in framework 4.5 (or earlier) that make ...
- 60.8k
11
votes
3
answers
39k
views
.NET Framework 4.0 does not install when 4.5 is already installed
I use Visual Studio 2012 for a WPF project needing (at least) .NET Framework 4.0.
I have 4.5 already installed, but people with Windows XP cannot install the application (because 4.5 does not ...
- 15.2k
11
votes
2
answers
5k
views
Can a Task have multiple awaiters?
I am toying around with an async service for a Windows 8 project and there are some async calls of this service, which should only be called once at a time.
public async Task CallThisOnlyOnce()
{
...
user604613
10
votes
5
answers
12k
views
Visual Studio 2012 missing frameworks
I have installed Visual Studio 2012 today, and i was excited, because i wanted to experiment with the latest framework version (.net 4.5). But it seems like Visual Studio 2012 doesnt show .net 4.0 and ...
- 103
9
votes
3
answers
3k
views
When exactly does .NET Monitor go to kernel-mode?
I would like to compile a list of all possible conditions making Monitor go to kernel-mode or use a kernel sync object.
The sync block has a field to reference the kernel object. Hence I deducted that ...
- 9,985
9
votes
1
answer
5k
views
Can a build server with .NET 4.5 installed successfully deploy a project targeting 4.0 to a server with only .NET 4.0 installed?
We've recently installed .NET 4.5 onto our continuous integration build server so that it can support new projects that utilize features of .NET 4.5. This build server is also used to build and deploy ...
- 2,395
9
votes
1
answer
2k
views
Difference in sorting between .NET 3.5 and .NET 4.0
I've come across a very weird behaviour of the .NET framework(s), when sorting a collection.
This behaviour is different between .NET 3.5 and 4.0 (but I think I know why), but more importantly (and ...
- 5,092
9
votes
2
answers
2k
views
visual studio debug fatal error 0x8007000e with .NET 4.5 while debugging .NET 4.0 application
After installing VS2012 and .NET 4.5 both Visual Studio 2010 and 2012 started hanging when debugging our application with a fatal error 0x8007000e. I know this error means the process is out of memory ...
- 430
9
votes
4
answers
13k
views
Msbuild fails with error msb4064 and msb4063
After installing Visual Studio 2012 with .NET 4.5 I started to get the following errors while building using msbuild:
error MSB4064:
The "SdkToolsPath" parameter is not supported by the "...
8
votes
1
answer
1k
views
Assembly.LoadFrom BadImageFormatException - different behavior in .NET 4.0 and 4.5 (possibly undocumented)
According to MSDN documentation,
public static Assembly LoadFrom(string assemblyFile)
throws BadImageFormatException if
assemblyFile is not a valid assembly.
-or-
Version 2.0 or later of the ...
- 2,918
7
votes
2
answers
1k
views
Target .net 4.5 but deploy to .net 4.0 is it possible?
I have to work under the following policy "all software must be 1 version behind", I don't particularly like this and I cant change it. so that would mean that our production machine will only go as ...
- 4,892
7
votes
3
answers
4k
views
Nant build using .NET 4.5 (Beta) assembly references despite specifying "net-4.0"
After installing .Net 4.5 Beta, the output of my Nant build fails with:
"could not load type 'System.Runtime.CompilerServices.ExtensionAttribute' from assembly 'mscorlib, Version=4.0.0.0, Culture=...
- 2,546
7
votes
2
answers
9k
views
GetSystemMetrics() returns different results for .NET 4.5 & .NET 4.0
During a .NET 4.0 -> .NET 4.5 application migration process I've discovered an extremely strange behavior. I've been able to track this issue down to this short code snippet:
class Program
{
[...
- 34k
7
votes
1
answer
413
views
What other silent changes did happen from .Net Frameworkf v.4.0 to 4.5? [closed]
We want to switch to .net 4.5 cause it offers many improvements.
But...sometimes I found some tricky details about not trivial changes in the framework.
Lets look for TPL unobserved exception ...
- 13.7k
7
votes
2
answers
12k
views
CRM Plugin: Custom Exception in Sandbox
I have a Dynamics CRM 2013 plugin executing in the Sandbox.
This code has the following custom exception class:
[Serializable]
public class PluginValidationException : Exception
{
...
- 7,174
7
votes
1
answer
486
views
SvcUtil /edb doesn't generate INotifyPropertyChange when DotNET 4.5 is installed
All of the dev computers here but one has DotNET 4.5 installed. The last one has 4.0 installed. Only the one with 4.0 generates proxy classes that implements INotifyPropertyChange, all other computers ...
- 8,174
6
votes
2
answers
2k
views
How to identify that an assembly has been compiled with/for .NET 4.5, as opposed to .NET 4.0?
I have some build agents that is building .NET code for us through a TeamCity setup, and I'm beginning to wonder if despite the project settings, they're outputting .NET 4.5 built assemblies. My ...
- 386k
6
votes
2
answers
10k
views
Getting AddressAlreadyInUseException after upgrading to .NET 4.5
I recently installed the new .NET Framework 4.5 (previously was 4.0 installed) on my Server and I´m getting a System.ServiceModel.AddressAlreadyInUseException when I start my Windows Service that ...
- 35.2k
6
votes
3
answers
11k
views
Downgrade code of HttpClient .NET 4.5 to .NET 4.0
I have this code that is working fine in .NET 4.5.
var handler = new HttpClientHandler();
handler.UseDefaultCredentials = true;
handler.PreAuthenticate = true;
handler.ClientCertificateOptions = ...
- 37k
6
votes
1
answer
5k
views
Can application built with .NET 4.5 run on .NET 4.0?
My project is targeting to .NET 4.5. It doesn't use any new 4.5 methods, so it actually works fine on the machine with only .NET 4.0 installed.
This is all good until I added some extension methods ...
- 733
6
votes
4
answers
6k
views
System.Tuple defined in multiple assemblies
I just installed VS 11 within Windows 8. When I got the latest of a solution built with VS 2010, then built it, I'm getting this error (in VS 11):
The predefined type 'System.Tuple' is defined in ...
- 33.9k
6
votes
1
answer
3k
views
Should I upgrade to be able to use the new async methods for SqlDataReader?
I'm working on a large project that runs on .NET 4.0. This framework uses ADO.NET for database calls and we're currently adding asynchronous API methods. The SqlCommand class has the APM methods ...
- 1,596
5
votes
3
answers
4k
views
Website upgraded to MVC 5 has missing DisplayMode property on ControllerContext
I recently updated my website to MVC 5. It ran well on my dev machine. when I moved to staging on shared hosting supporting .Net 4.0 where my MVC 4 site worked just fine. After deployment I received ...
- 3,243
5
votes
4
answers
15k
views
Development for .NET 4.0 (Windows XP) with Visual Studio 2012
.NET 4.5 is an in-place-upgrade and therefore replaces .NET 4.0. Consequently when I install .NET 4.5 with Visual Studio 2012 I can no longer develop applications for .NET 4.0.
As .NET 4.5 is not ...
- 9,060
5
votes
1
answer
4k
views
Is CancellationTokenSource.CancelAfter() leaky?
The release of the Async Targeting Pack prompted me to use ILSpy to have a look at what Task-based Asynchronous Pattern (TAP) extension methods were provided there (some of which I have already ...
- 16k
5
votes
4
answers
2k
views
How to make Sequential Processing as simple as Parallel Processing
I've got two .net Task objects that I may wish to run in parellel or in sequence. In either case, I don't want to block a thread to wait for them. As it turns out, Reactive Extensions make the ...
- 29.7k
5
votes
1
answer
2k
views
Compile .net 4.0 project on build server with .net 4.5
We're having the seemingly common error
Could not load type 'System.Runtime.CompilerServices.ExtensionAttribute' from assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=...
- 4,439
5
votes
1
answer
1k
views
Has extending static classes using extension methods been made possible in .NET 4.0+?
I have read that it is possible to extend static classes in F#, though it was not yet possible in C#. Multiple workarounds are proposed and therefore suggesting that this type of extension could be ...
- 23.9k
5
votes
0
answers
3k
views
Does SmtpClient support international email addresses (IDN/Intl email) in .Net 4.0?
In .Net 4.5 SmtpClient have public property DeliveryFormat which accepts values of the System.Net.Mail.SmtpDeliveryFormat type. So I can assign DeliveryFormat value SmtpDeliveryFormat.International ...
- 111
5
votes
3
answers
2k
views
Missing Frameworks after installing VS 2012 [closed]
So I have two machines I have installed 2012 on and they do not have identical frameworks installed on them the correct one looks like this
Machine A Screenshot:
But the incorrect one looks like ...
- 6,857
4
votes
4
answers
11k
views
.NET 4.0 substitutes for .NET 4.5 namespaces
There is some code for an MVC application which was built using .NET 4.5 as a framework in VS 2012. My current system forces me to work on VS 2010. I managed to open the VS2012 solution in my VS2010, ...
- 16.3k
4
votes
1
answer
308
views
Method with no parameters in c# and still a method?
All i am trying to do is to check whether all elements of list B are in list A
if (listA.All(element => listB.Contains(element))
{
return;
}
Someone came up ...
4
votes
2
answers
3k
views
'System.Guid' is not an attribute class
I am creating a new dll application with Visual Studio 2013 based on .net 4.5.
When trying to define the Guid attribute on my class like this:
[Guid("4245366B-0484-4A41-A2E8-C7D9FC3A4ED7")]
The ...
- 1,459