To mark a lambda async, simply prepend async before its argument list: // Add a command to delete the current Group contextMenu.Commands.Add(new UICommand(“Delete this Group”, async (contextMenuCmd) => { SQLiteUtils slu = new SQLiteUtils(); await slu.DeleteGroupAsync(groupName); }));
It’s fine to have a static field in a generic type, so long as you know that you’ll really get one field per combination of type arguments. My guess is that R# is just warning you in case you weren’t aware of that. Here’s an example of that: using System; public class Generic<T> { // … Read more
The warning tells you that the variables end and start stay alive as any of the lambdas inside this method stay alive. Take a look at the short example protected override void OnLoad(EventArgs e) { base.OnLoad(e); int i = 0; Random g = new Random(); this.button1.Click += (sender, args) => this.label1.Text = i++.ToString(); this.button2.Click += … Read more
Implementation of All according to ILSpy (as in I actually went and looked, rather than the “well, that method works a bit like …” I might do if we were discussing the theory rather than the impact). public static bool All<TSource>(this IEnumerable<TSource> source, Func<TSource, bool> predicate) { if (source == null) { throw Error.ArgumentNull(“source”); } … Read more
If your projects aren’t all AnyCpu then you may also want to check that the following 2 settings match: [Right click test project] -> properties -> Build -> Platform target – e.g. x64 [Main Menu] -> Test -> Test Settings -> Default Processor Architecture -> X64 I found that when these didn’t match my test … Read more
It is not only aesthetic, but it also reduces the maximum nesting level inside the method. This is generally regarded as a plus because it makes methods easier to understand (and indeed, many static analysis tools provide a measure of this as one of the indicators of code quality). On the other hand, it also … Read more
In this case, it’s okay, since you are actually executing the delegate within the loop. If you were saving the delegate and using it later, however, you’d find that all of the delegates would throw exceptions when trying to access files[i] – they’re capturing the variable i rather than its value at the time of … Read more
If you have ReSharper, try emptying the ReSharper cache: In menu, ReSharper > Options > Environment > General > Clear Caches and disabling and re-enabling ReSharper: In menu, Tools > Options > ReSharper > General > Suspend / Restore
You can disable ReSharper 5 and newer versions by using the Suspend Now button in menu Tools → Options → ReSharper.
The problem with taking IEnumerable as a parameter is that it tells callers “I wish to enumerate this”. It doesn’t tell them how many times you wish to enumerate. I can change the objects parameter to be List and then avoid the possible multiple enumeration but then I don’t get the highest object that I … Read more