The short answer: you can’t do it in an easy way. The ConcurrentBag keeps a thread local queue for each thread and it only looks at other threads’ queues once its own queue becomes empty. If you remove an item and put it back then the next item you remove may be the same item … Read more
That is a convention used when you don’t care about the parameter.
One good use case for ‘Optional parameters’ in conjunction with ‘Named Parameters’ in C# 4.0 is that it presents us with an elegant alternative to method overloading where you overload method based on the number of parameters. For example say you want a method foo to be be called/used like so, foo(), foo(1), foo(1,2), foo(1,2, … Read more
On the Web API side, simply use Request object instead of creating new HttpRequestMessage var re = Request; var headers = re.Headers; if (headers.Contains(“Custom”)) { string token = headers.GetValues(“Custom”).First(); } return null; Output –
Overloadable Operators, from MSDN: Assignment operators cannot be overloaded, but +=, for example, is evaluated using +, which can be overloaded. Even more, none of assignment operators can be overloaded. I think this is because there will be an effect for the Garbage collection and memory management, which is a potential security hole in CLR … Read more
You are getting that error because the Task class already started the task before giving it to you. You should only ever call Start on a task that you create by calling its constructor, and you shouldn’t even do that unless you have a compelling reason to not start the task when you create it; … Read more
This msdn article explains it very well with examples, “A tuple is a data structure that has a specific number and sequence of elements“. Tuples are commonly used in four ways: To represent a single set of data. For example, a tuple can represent a database record, and its components can represent individual fields of … Read more
ColumnNames is a property of type List<String> so when you are setting up you need to pass a List<String> in the Returns call as an argument (or a func which return a List<String>) But with this line you are trying to return just a string input.SetupGet(x => x.ColumnNames).Returns(temp[0]); which is causing the exception. Change it … Read more
You could use a nested Any() for this check which is available on any Enumerable: bool hasMatch = myStrings.Any(x => parameters.Any(y => y.source == x)); Faster performing on larger collections would be to project parameters to source and then use Intersect which internally uses a HashSet<T> so instead of O(n^2) for the first approach (the … Read more
The Main() method is created automatically. If you want to provide your own you have to (tested in VS2013, VS2017 and VS2019): Right-click App.xaml in the solution explorer, select Properties Change ‘Build Action’ to ‘Page’ (initial value is ‘ApplicationDefinition’) Then just add a Main() method to App.xaml.cs. It could be like this: [STAThread] public static … Read more