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Questions tagged [dispose]

Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources

Microsoft.NET

The pattern for disposing an object, referred to as a dispose pattern, imposes order on the lifetime of an object. The dispose pattern is used only for objects that access unmanaged resources. This is because the garbage collector is very efficient at reclaiming unused managed objects.

A type's Dispose method should release all the resources that it owns. It should also release all resources owned by its base types by calling its parent type's Dispose method. The parent type's Dispose method should release all resources that it owns and in turn call its parent type's Dispose method, propagating this pattern through the hierarchy of base types.

Reference

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Should a .Net/C# object call Dispose() on itself?

Below is some sample code written by a colleague. This seems obviously wrong to me but I wanted to check. Should an object call its own Dispose() method from within one of its own methods? It seems to me that only the owner/creator of the object…
Tom Winter
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Will a using clause close this stream?

I've apparently worked myself into a bad coding habit. Here is an example of the code I've been writing: using(StreamReader sr = new StreamReader(File.Open("somefile.txt", FileMode.Open))) { //read file } File.Move("somefile.txt",…
scottm
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Does "using" statement always dispose the object?

Does the using statement always dispose the object, even if there is a return or an exception is thrown inside it? I.E.: using (var myClassInstance = new MyClass()) { // ... return; } or using (var myClassInstance = new MyClass()) { //…
Guillermo Gutiérrez
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Any sense to set obj = null(Nothing) in Dispose()?

Is there any sense to set custom object to null(Nothing in VB.NET) in the Dispose() method? Could this prevent memory leaks or it's useless?! Let's consider two examples: public class Foo : IDisposable { private Bar bar; // standard custom .NET…
serhio
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Who Disposes of an IDisposable public property?

If I have a SomeDisposableObject class which implements IDisposable: class SomeDisposableObject : IDisposable { public void Dispose() { // Do some important disposal work. } } And I have another class called AContainer, which…
GrahamS
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Is SqlCommand.Dispose() required if associated SqlConnection will be disposed?

I usually use code like this: using (var connection = new SqlConnection(ConfigurationManager.ConnectionStrings["MyConn"].ConnectionString)) { var command = connection.CreateCommand(); command.CommandText = "..."; connection.Open(); …
abatishchev
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C#: Do I need to dispose a BackgroundWorker created at runtime?

I typically have code like this on a form: private void PerformLongRunningOperation() { BackgroundWorker worker = new BackgroundWorker(); worker.DoWork += delegate { // perform long running operation…
RickL
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Dispose() for cleaning up managed resources?

In this answer I found, Cleanup the unmanaged resources in the Finalize method and the managed ones in the Dispose method, when the Dispose/Finalize pattern has been used in your code. And later I found this nice article about finalize and…
Sharun
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How to dispose resources with dependency injection

I'm using StructureMap to resolve references to my repository class. My repository interface implements IDisposable, e.g. public interface IMyRepository : IDisposable { SomeClass GetById(int id); } An implementation of the interface using Entity…
Fixer
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Disposing needed in Unity?

Probably a Unity beginner's question: when using Unity, would you still need to implement Dispose methods on the objects you have injected? Or is even this not needed (so, done automatically by Unity)? This is in the context of a web application.
hetnet
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In Java, how to check that AutoCloseable.close() has been called?

I am authoring a java library. Some of the classes that are meant to be used by library users, hold native system resources (over JNI). I'd like to ensure that the user "disposes" these objects, as they are heavy, and in a testsuite they may cause…
haelix
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Best practice for disposing Completable, Single, Maybe and terminating Observables in RxJava

I'm asking this from an Android perspective, but this should apply to RxJava in general. As a best practice, should my view always dispose of even short lived Completable, Single, Maybe and terminating Observable Rx types that should terminate in…
HolySamosa
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Do IDisposable objects get disposed of if the program is shut down unexpectedly?

What happens if the program exits unexpectedly (either by exception or the process is terminated)? Are there any situations like this (or otherwise) where the program will terminate, but IDisposable objects won't be properly disposed of? The reason…
JSideris
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Avoid calling Invoke when the control is disposed

I have the following code in my worker thread (ImageListView below is derived from Control): if (mImageListView != null && mImageListView.IsHandleCreated && !mImageListView.IsDisposed) { if (mImageListView.InvokeRequired) …
Ozgur Ozcitak
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Understanding Streams and their lifetime (Flush, Dispose, Close)

Note: I've read the following two questions already: Can you explain the concept of streams? C# using streams I'm coding in C# In almost all code samples that use streams, .Dispose(), .Flush(), .Close() are almost always called. In the concept…
Omar
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