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C# Cannot Convert Anonymous Method To System.delegate

share|improve this answer answered Sep 12 '08 at 17:07 Chris Marasti-Georg 23k1375119 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Could I work as a Professor in Europe if I only speak English? Does sputtering butter mean that water is present? If a reviewer makes significant contributions to improving a paper, may he/she suggest becoming a coauthor? this contact form

Calling BeginInvoke(..., new object[2]) would cause the error, as internally the array is treated as if I had called BeginInvoke(..., null, null), so the delegate would have to take two nullable Safely adding insecure devices to my home network The nth numerator Why does Friedberg say that the role of the determinant is less central than in former times? You will need to cast via object instead: (Delegate)(object)d However, personally I think you should be storing DelegateType, not Delegate, i.e. They don’t exist (not yet). http://stackoverflow.com/questions/15935867/cannot-convert-anonymous-method-to-type-system-delegate-because-it-is-not-a-de

The method is described here. –Allon Guralnek Oct 15 '12 at 15:41 Ha! Solutions? However, only the system and compilers can derive explicitly from the Delegate class or from the MulticastDelegate class. asked 3 years ago viewed 652 times active 6 months ago Visit Chat Linked 57 C# Generics won't allow Delegate Type Constraints Related 95Event Signature in .NET — Using a Strong

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The Delegate class is not considered a delegate type; it is a class used to derive delegate types. Obviously anonymous delegates are not casted to System.Delegate implicitly. Newton's second law for individual forces Prepared for Yet Another Simple Rebus? You can downcast any delegate type (such as EvantHandler, Action, Func) to Delegate but you have to actually create a delegate type first! –George Mauer Aug 29 '09 at 3:10 add

BeginInvoke((progressDelegate)delegate { bgWorker_ProgressChanged(sender, e); }); c# .net delegates .net-2.0 anonymous-methods share|improve this question edited Feb 24 '12 at 22:31 abatishchev 57.4k57215356 asked Jun 9 '09 at 7:48 Mez 1,95841726 1 Sign in to comment Contact GitHub API Training Shop Blog About © 2016 GitHub, Inc. more hot questions question feed lang-cs about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation VS 20120 RC ALM Virtual Machine Searching TFS work items in Visual Studio 2010 IIS: Management Service Delegation not visible Learn by doing: Linq koans JSON to C# NDC 2012: a

The nth numerator lowercase breadcrumbs On 1941 Dec 7, could Japan have destroyed the Panama Canal instead of Pearl Harbor in a surprise attack? http://stackoverflow.com/questions/12898031/cannot-convert-anonymous-method-to-type-system-windows-threading-dispatcherprio void bgWorker_ProgressChanged(object sender, ProgressChangedEventArgs e) { if (InvokeRequired) { //Won't compile BeginInvoke(delegate(object sender, ProgressChangedEventArgs e) { bgWorker_ProgressChanged(sender, e); }); } progressBar1.Increment(e.ProgressPercentage); } It tells me 'cannot convert from 'anonymous method' to Why do I never get a mention at work? Tank-Fighting Alien What do ^$ and ^# mean?

However no luck, the compiler complained with the following error: "Cannot convert anonymous method to type ‘System.Delegate' because it is not a delegate type'." If anyone can explain me why this weblink Singular cohomology and birational equivalence Was there no tax before 1913 in the United States? It is just hidden from normal view. Interesting side-question: how would I pass an array object to BeginInvoke so I can have a delegate that expects a single object[] array parameter? –Thorsten Dittmar Oct 15 '12 at 15:09

However, here it is possible to pass delegates with different signatures. up vote 3 down vote The Invoke method has a parameter of type Delegate, and you can only convert an anonymous function to a specific delegate type. I'd suggest using a BackgroundWorker instance to handle UI Thread affinity. navigate here You might find it useful to add a where DelegateType : class, just to stop usage with int etc, but you can't do this all through generics.

Which movie series are referenced in XKCD comic 1568? OpenGL uses a GL context, and you can only draw to it from the same thread it was created on. Depalindromize this string!

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lambda notation10EventHandlers and Anonymous Delegates / Lambda Expressions11Delegates and Lambdas and LINQ, Oh My!23ThreadPool.QueueUserWorkItem with a lambda expression and anonymous method18Anonymous method as parameter to BeginInvoke?16Why don't anonymous delegates/lambdas infer types Now compiled! –Superjet100 Apr 24 '13 at 8:05 add a comment| up vote 0 down vote You might be confused with Invoke and BeginInvoke: public void Invoke(Action callback, DispatcherPriority priority) //no Browse other questions tagged c# multithreading dispatcher or ask your own question. I changed one method signature and broke 25,000 other classes.

It could create an anonymous type of type delegate for us, but it does not work like that. Line 1 works because we tell the compiler what delegate type to use and they match, so it works. If those answers do not fully address your question, please ask a new question. http://mediastartpage.com/c-cannot/c-cannot-assign-method-group-to-anonymous-type-property.html If that Do function had took Action<>, Action<,> ...

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