Is there an exponent operator in C#?
The C# language doesn’t have a power operator. However, the .NET Framework offers the Math.Pow method: Returns a specified number raised to the specified power. So your example would look like this:
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Tree data structure in C#
My best advice would be that there is no standard tree data structure because there are so many ways you could implement it that it would be impossible to cover all bases with one solution. The more specific a solution, the less likely it is applicable to any given problem. I even get annoyed with … Read more
Collection was modified; enumeration operation may not execute
What’s likely happening is that SignalData is indirectly changing the subscribers dictionary under the hood during the loop and leading to that message. You can verify this by changing To If I’m right, the problem will disappear. Calling subscribers.Values.ToList() copies the values of subscribers.Values to a separate list at the start of the foreach. Nothing else has access to this list (it … Read more
What are Virtual Methods?
Why would you declare a method as “virtual”. What is the benefit in using virtual?
How do I remedy “The breakpoint will not currently be hit. No symbols have been loaded for this document.” warning?
Start debugging, as soon as you’ve arrived at a breakpoint or used Debug > Break All, use Debug > Windows > Modules. You’ll see a list of all the assemblies that are loaded into the process. Locate the one you want to get debug info for. Right-click it and select Symbol Load Information. You’ll get a dialog … Read more
Select distinct using linq
Edit: as getting this IEnumerable<> into a List<> seems to be a mystery to many people, you can simply write: But one is often better off working with the IEnumerable rather than IList as the Linq above is lazily evaluated: it doesn’t actually do all of the work until the enumerable is iterated. When you call ToList it actually walks the entire enumerable forcing all … Read more
What does {0} mean when found in a string in C#?
You are printing a formatted string. The {0} means to insert the first parameter following the format string; in this case the value associated with the key “rtf”. For String.Format, which is similar, if you had something like you’d create a string “This is a test. The value is 42“. You can also use expressions, and print … Read more
There is no argument given that corresponds to the required formal parameter – .NET Error
You have a constructor which takes 2 parameters. You should write something like: It’s less code and easier to read. EDIT Or, in order for your way to work, you can try writing a default constructor for ErrorEventArg which would have no parameters, like this:
How to keep console window open
You forgot calling your method: it should stop your console, but the result might not be what you expected, you should change your code a little bit:
How to add a delay for a 2 or 3 seconds
How can I add a delay to a program in C#?