Is it safe to use the using statement on a (potentially) null object? Consider the following example: class Test { IDisposable GetObject(string name) { // returns null if not found } void DoSomething() { using (IDisposable x = GetObject(“invalid name”)) { if (x != null) { // etc… } } } } Is it guaranteed … Read more
DataSet and DataTable both implement IDisposable, so, by conventional best practices, I should call their Dispose() methods. However, from what I’ve read so far, DataSet and DataTable don’t actually have any unmanaged resources, so Dispose() doesn’t actually do much. Plus, I can’t just use using(DataSet myDataSet…) because DataSet has a collection of DataTables. So, to … Read more
Something like: using (IDisposable disposable = GetSomeDisposable()) { //….. //…… return Stg(); } I believe it is not a proper place for a return statement, is it? 7 Answers 7
In .NET, under which circumstances should I use GC.SuppressFinalize()? What advantage(s) does using this method give me? 5 Answers 5
System.Net.Http.HttpClient and System.Net.Http.HttpClientHandler in .NET Framework 4.5 implement IDisposable (via System.Net.Http.HttpMessageInvoker). The using statement documentation says: As a rule, when you use an IDisposable object, you should declare and instantiate it in a using statement. This answer uses this pattern: var baseAddress = new Uri(“http://example.com”); var cookieContainer = new CookieContainer(); using (var handler = new … Read more
C# 2008 I have been working on this for a while now, and I am still confused about the use of finalize and dispose methods in code. My questions are below: I know that we only need a finalizer while disposing unmanaged resources. However, if there are managed resources that make calls to unmanaged resources, … Read more
I know from reading the Microsoft documentation that the “primary” use of the IDisposable interface is to clean up unmanaged resources. To me, “unmanaged” means things like database connections, sockets, window handles, etc. But, I’ve seen code where the Dispose() method is implemented to free managed resources, which seems redundant to me, since the garbage … Read more
