This is not possible. Enums cannot inherit from other enums. In fact all enums must actually inherit from System.Enum. C# allows syntax to change the underlying representation of the enum values which looks like inheritance, but in actuality they still inherit from System.enum. See section 8.5.2 of the CLI spec for the full details. Relevant … Read more
There’s no built in method to do that. You can use the expression: (date1 > date2 ? date1 : date2) to find the maximum of the two. You can write a generic method to calculate Min or Max for any type (provided that Comparer<T>.Default is set appropriately): public static T Max<T>(T first, T second) { … Read more
I assume this is either difficult or impossible for the compiler team to implement for some reason. No, it is not at all difficult or impossible to implement — the fact that you implemented it yourself is a testament to that fact. Rather, it is an incredibly bad idea and so we don’t allow it, … Read more
There is already a foreach statement included in the language that does the job most of the time. I’d hate to see the following: list.ForEach( item => { item.DoSomething(); } ); Instead of: foreach(Item item in list) { item.DoSomething(); } The latter is clearer and easier to read in most situations, although maybe a bit … Read more
internal is for assembly scope (i.e. only accessible from code in the same .exe or .dll) private is for class scope (i.e. accessible only from code in the same class).
To get the AppData directory, it’s best to use the GetFolderPath method: Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) (must add using System if not present). %AppData% is an environment variable, and they are not automatically expanded anywhere in .NET, although you can explicitly use the Environment.ExpandEnvironmentVariable method to do so. I would still strongly suggest that you use GetFolderPath however, … Read more
32-bit %windir%\Microsoft.NET\Framework\[version]\config\machine.config 64-bit %windir%\Microsoft.NET\Framework64\[version]\config\machine.config [version] should be equal to v1.0.3705, v1.1.4322, v2.0.50727 or v4.0.30319. v3.0 and v3.5 just contain additional assemblies to v2.0.50727 so there should be no config\machine.config. v4.5.x and v4.6.x are stored inside v4.0.30319.
First of all, IQueryable<T> extends the IEnumerable<T> interface, so anything you can do with a “plain” IEnumerable<T>, you can also do with an IQueryable<T>. IEnumerable<T> just has a GetEnumerator() method that returns an Enumerator<T> for which you can call its MoveNext() method to iterate through a sequence of T. What IQueryable<T> has that IEnumerable<T> doesn’t … Read more
From How to tell if path is file or directory: // get the file attributes for file or directory FileAttributes attr = File.GetAttributes(@”c:\Temp”); //detect whether its a directory or file if ((attr & FileAttributes.Directory) == FileAttributes.Directory) MessageBox.Show(“Its a directory”); else MessageBox.Show(“Its a file”); Update for .NET 4.0+ Per the comments below, if you are on … Read more
In order to create an instance of a generic type in a function you must constrain it with the “new” flag. public static string GetAllItems<T>(…) where T : new() However that will only work when you want to call the constructor which has no parameters. Not the case here. Instead you’ll have to provide another … Read more