Although nobody can really tell you why there is no SortedList<T>, it is possible to discuss why SortedList takes a key and a value. A dictionary maps keys to values. The typical ways to do this are with a binary tree, a hash table, and a list (array), though hash tables are most common because … Read more
This has been for a long time and continues to be confusing. I have seen such messaging myself but as of right now, it appears System.Net.Http is the correct choice, at least for .NET on the Windows platform and has no external dependencies. For .NET Core, I have used Microsoft.Net.Http although it does require Microsoft.BCL. … Read more
ManualResetEvent and ManualResetEventSlim both are designed so that they remained signaled after calling. This is typically for a very different scenario than AutoResetEvent. AutoResetEvent immediately returns to the unsignaled state after usage, which is typically used for a different set of scenarios. From AutoResetEvents documentation: Typically, you use this class when threads need exclusive access … Read more
This should work: byte ConvertToByte(BitArray bits) { if (bits.Count != 8) { throw new ArgumentException(“bits”); } byte[] bytes = new byte[1]; bits.CopyTo(bytes, 0); return bytes[0]; }
private int getIntFromBitArray(BitArray bitArray) { if (bitArray.Length > 32) throw new ArgumentException(“Argument length shall be at most 32 bits.”); int[] array = new int[1]; bitArray.CopyTo(array, 0); return array[0]; }
Because List<T> implements all of the necessary methods/properties/etc. (and then some) of IReadOnlyList<T>. An interface is a contract that says “I can do at least these things.” The documentation for IReadOnlyList<T> says it represents a read-only collection of elements. That’s right. There are no mutator methods in that interface. That’s what read-only means, right? IReadOnlyList<T> … Read more
Well, for one thing it’s not clear whether you expect this to be insertion-order or key-order. For example, what would you expect the result to be if you wrote: var test = new Dictionary<int, string>(); test.Add(3, “three”); test.Add(2, “two”); test.Add(1, “one”); test.Add(0, “zero”); Console.WriteLine(test.ElementAt(0).Value); Would you expect “three” or “zero”? As it happens, I think … Read more
The assemblies Microsoft.Threading.Tasks and Microsoft.Threading.Tasks.Extensions are still referencing v1.5.11.0 of System.Runtime and System.Threading.Tasks. Without the bindingRedirect, the Microsoft.* assemblies would try to load an old version of the System.* assemblies, which would fail.
Indeed, it is for performance reasons. The BCL team did a lot of research on this point before deciding to go with what you rightly call out as a suspicious and dangerous practice: the use of a mutable value type. You ask why this doesn’t cause boxing. It’s because the C# compiler does not generate … Read more
I would call Directory.CreateDirectory(@”C:\dir0\dir1\dir2\dir3\dir4\”). Contrary to popular belief, Directory.CreateDirectory will automatically create whichever parent directories do not exist. In MSDN’s words, Creates all directories and subdirectories as specified by path. If the entire path already exists, it will do nothing. (It won’t throw an exception)