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The Type Arguments Cannot Be Inferred From The Usage Linq

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This is my code for the caching class: public static bool AddItemToCache(string key, Dictionary cacheItem, DateTime dt) { if (!IsCached(key)) { System.Web.HttpRuntime.Cache.Insert(key, cacheItem, null, dt, TimeSpan.Zero); return IsCached(key); } return It was to be a simple method, that just returning a property of the objects with a separator character between each. Not the answer you're looking for? Option 2 simply replaces IChromosome with a generic type U which is restricted to a class that implements IChromosome. their explanation

The Type Arguments Cannot Be Inferred From The Usage Linq

Prepared for Yet Another Simple Rebus? What do ^$ and ^# mean? Try specifying the type arguments explicitly.

After correcting the method signature to use an IList, everything was fine… Post navigation ← A pledge to visit Europe in 2007 Use app_offline.htm to take your asp.net 2.0 application offline Try specifying the type arguments explicitly up vote 0 down vote favorite I've got a linq query that I am returning a Dictionary from. Where now? –Stu Apr 8 '13 at 6:16 I have no new ideas... The Type Arguments For Method Cannot Be Inferred From The Usage Razor A security hole may exist: Method '' is already declared in interface '' Method '' cannot implement partial method '' because '' already implements it Method '' does not have the

Three questions: what does adding in do, what does this error mean and why doesn't it work? The Type Arguments For Method Cannot Be Inferred From The Usage Mvc that I am getting the error. But once again, having the compiler infer the type for TKey and TValue is probably not possible it you work with reflection. Center trace between two pads Teenage daughter refusing to go to school Looking for a nice example for normal subgroups Assigning a unique representation to equivalent circular queues Does every interesting

Solutions? The Type Arguments Cannot Be Inferred From The Query Which movie series are referenced in XKCD comic 1568? But if as from Eric Lippert explaint, the generic constraints are not used for solving the generic return types, then this would not work. This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL) Top Experts Last 24hrsThis month OriginalGriff 475 John Simmons / outlaw

The Type Arguments For Method Cannot Be Inferred From The Usage Mvc

Learning resources Microsoft Virtual Academy Channel 9 MSDN Magazine Community Forums Blogs Codeplex Support Self support Programs BizSpark (for startups) Microsoft Imagine (for students) United States (English) Newsletter Privacy & cookies https://msdn.microsoft.com/en-us/library/bb531238(v=vs.90).aspx try specifying the type arguments explicitly Rate this: Please Sign up or sign in to vote. The Type Arguments Cannot Be Inferred From The Usage Linq Terms of Service Layout: fixed | fluid CodeProject, 503-250 Ferrand Drive Toronto Ontario, M3C 3G8 Canada +1 416-849-8900 x 100 Craig's (); // Stupid .NET Tricks #12 May 15, 2008 The Type Arguments Cannot Be Inferred From The Usage Selectmany Is adding the ‘tbl’ prefix to table names really a problem?

public abstract class CriteriaBase where T : ICrossoverable where U : IChromosome { protected abstract Func Criteria { get; } //some code removed for brevity private int GetNumberOfCriteriaMatches(T season) check my blog Assigning a unique representation to equivalent circular queues Is it acceptable to ask an unknown professor for help in a related field during his office hours? Learning resources Microsoft Virtual Academy Channel 9 MSDN Magazine Community Forums Blogs Codeplex Support Self support Programs BizSpark (for startups) Microsoft Imagine (for students) United States (English) Newsletter Privacy & cookies As a rule, you're not going to have any luck with type inference when your method signature has fewer types of parameters than it has generic type parameters. The Type Arguments For Method Cannot Be Inferred From The Usage Mvc View

Does the answer differ depending on the version? asked 6 years ago viewed 50190 times active 1 year ago Visit Chat Linked 11 Generic extension method : Type argument cannot be inferred from the usage 2 SelectMany from grouped Or is this simply that the .NET implementors didn't carry the concept one step further? this content The compiler will not accept an IDictionary as a parameter to WriteXmlDictionary anyway.

So, I received an error message similar to the following: Compiler Error Message: CS0411: The type arguments for method ‘TextFormatUtil.FormatMyList(System.Collections.Generic.List)' cannot be inferred from the usage. The Type Arguments For Method Cannot Be Inferred From The Usage Orderby The problem arises when I try to use generics for the Func. The error explains that the compiler cannot use type inference to find data types for the type parameters that are compatible with the arguments.Note When specifying arguments is not an option

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Option 2 is how I originally wrote the code but I get the compile error as listed. You’ll be auto redirected in 1 second. Is there a name for the (anti- ) pattern of passing parameters that will only be used several levels deep in the call chain? The Type Arguments Cannot Be Inferred From The Usage Linq Join You're casting the property value to an IDictionary.

If not, how should I approach this problem? The content you requested has been removed. In my simple mind, options 1 and 2 are equivalent. have a peek at these guys Teenage daughter refusing to go to school How to replace inner text with yanked text Add-in salt to injury?

Browse other questions tagged c# linq dictionary or ask your own question. Making a large file using the terminal Find the function given its Fourier series How to use namedpipe as temporary file? IAccess access = service.Get(new Signatur()); } share|improve this answer answered Oct 12 '10 at 17:24 Dan Tao 79k27206359 add a comment| up vote 2 down vote Now my aim was Try specifying the type arguments explicitly4SelectMany type arguments cannot be inferred from usage1The type arguments for method '' cannot be inferred from the usage.

Try specifying the type arguments //explicitly. But this one method, refuses to compile with the error message of the thread subject. MSDN Library MSDN Library MSDN Library MSDN Library Design Tools Development Tools and Languages Mobile and Embedded Development .NET Development Office development Online Services Open Specifications patterns & practices Servers and Ask a question Quick access Forums home Browse forums users FAQ Search related threads Remove From My Forums Answered by: Type arguments for method cannot be inferred from the usage for

Try specifying the type arguments ex - error. Print a letter Fibonacci How to replace inner text with yanked text The 10'000 year skyscraper more hot questions question feed lang-cs about us tour help blog chat data legal privacy I renamed ICrossoverable to IOrganism as it fits much better with the genetic algorithm terminology. Find the function given its Fourier series Are 14 and 21 the only "interesting" numbers?

I pose a question at the bottom; dear lazyweb, please explain. .NET's type inference lets you avoid specifying the type of a generic parameter on a method call some, but not Try specifying the type arguments explicitly2GetInstance()' cannot be inferred from the usage. Browse other questions tagged c# generics inheritance type-conversion or ask your own question. Why put a warning sticker over the warning on this product?

Does トイレ refer to the British "toilet" or the American "toilet"? In a company crossing multiple timezones, is it rude to send a co-worker a work email in the middle of the night? Learning resources Microsoft Virtual Academy Channel 9 MSDN Magazine Community Forums Blogs Codeplex Support Self support Programs BizSpark (for startups) Microsoft Imagine (for students) United States (English) Newsletter Privacy & cookies Wait...