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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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How do I extend a WinForm's Dispose method?

I am getting this warning from FxCop: "'RestartForm' contains field 'RestartForm.done' that is of IDisposable type: 'ManualResetEvent'. Change the Dispose method on 'RestartForm' to call Dispose or Close on this field." Ok, I understand what this…
Matthew Scharley
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Does garbage collector call Dispose()?

I thought the GC would call Dispose eventually if your program did not but that you should call Dispose() in your program just to make the cleanup deterministic. However, from my little test program, I don't see Dispose getting called at…
noctonura
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Why call dispose(false) in the destructor?

What follows is a typical dispose pattern example: public bool IsDisposed { get; private set; } #region IDisposable Members public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } protected virtual void Dispose(bool…
ryeguy
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Is there a situation in which Dispose won't be called for a 'using' block?

This was a telephone interview question I had: Is there a time when Dispose will not be called on an object whose scope is declared by a using block? My answer was no - even if an exception happens during the using block, Dispose will still be…
AdamCrawford
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Declare IDisposable for the class or interface?

Starting from the following situation: public interface ISample { } public class SampleA : ISample { // has some (unmanaged) resources that needs to be disposed } public class SampleB : ISample { // has no resources that needs to be…
Beachwalker
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How do I add Dispose functionality to a C# UserControl?

I have a class which implements UserControl. In .NET 2005, a Dispose method is automatically created in the MyClass.Designer.cs partial class file that looks like this: protected override void Dispose(bool disposing) { if (disposing &&…
e-holder
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Does SqlCommand.Dispose close the connection?

Can I use this approach efficiently? using(SqlCommand cmd = new SqlCommand("GetSomething", new SqlConnection(Config.ConnectionString)) { cmd.Connection.Open(); // set up parameters and CommandType to StoredProcedure etc. etc. …
Andrei Rînea
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Should I always disconnect event handlers in the Dispose method?

I'm working in C# and my workplace has some code standards. One of them is that each event handler we connect (such as KeyDown) must be disconnected in the Dispose method. Is there any good reason for that?
No Idea For Name
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How to dispose of my Stateful Widget completely?

I call my stateful widget page and get some info from the server. If no info found it warns the user that there isn't any info. From the drawer back button, I go back to the previous page. If I keep repeat back and forth very fast I get an error on…
Nick
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What's the point of overriding Dispose(bool disposing) in .NET?

If I write a class in C# that implements IDisposable, why isn't is sufficient for me to simply implement public void Dispose(){ ... } to handle freeing any unmanaged resources? Is protected virtual void Dispose(bool disposing){ ... } always…
Mark Carpenter
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Is it necessary to dispose System.Timers.Timer if you use one in your application?

I am using System.Timers.Timer class in one of the classes in my application. I know that Timer class has Dispose method inherited from the parent Component class that implements IDisposable interface. Instances of the class below are created many…
Roman Shumikhin
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How to abort socket's BeginReceive()?

Naturally, BeginReceive() will never end if there's no data. MSDN suggests that calling Close() would abort BeginReceive(). However, calling Close() on the socket also performs a Dispose() on it, as figured out in this great answer, and consequently…
Day_Dreamer
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What's the purpose of the components IContainer generated by the Winforms designer?

When you create a new form in Visual Studio, the designer generates the following code in the .Designer.cs file: /// /// Required designer variable. /// private System.ComponentModel.IContainer components = null; ///…
bentsai
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Dispose vs Dispose(bool)

I am confused about dispose. I am trying to get my code disposing resources correctly. So I have been setting up my classes as IDisposable (with a Dispose method) them making sure that the Dispose method gets called. But now FXCop is telling me…
Vaccano
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"Object can be disposed of more than once" error

When I run code analysis on the following chunk of code I get this message: Object 'stream' can be disposed more than once in method 'upload.Page_Load(object, EventArgs)'. To avoid generating a System.ObjectDisposedException you should not call…
Mike Jones
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