IDISP004

Don't ignore created IDisposable

Topic	Value
Id	IDISP004
Severity	Warning
Enabled	True
Category	IDisposableAnalyzers.Correctness
Code	CreationAnalyzer

Description

Don't ignore created IDisposable.

Motivation

In the following code the file is opened but not closed.

public sealed class Foo
{
    public Foo()
    {
        File.OpenRead("file.txt");
    }
}

How to fix violations

Assign the value to a field or property or use it in a using if it is a temporary value.

In the following code the file is opened but not closed.

public sealed class Foo
{
    public Foo()
    {
        using(var file = File.OpenRead("file.txt"))
        {
            ...
        }
    }
}

Configure severity

Via ruleset file.

Configure the severity per project, for more info see MSDN.

Via #pragma directive.

#pragma warning disable IDISP004 // Don't ignore created IDisposable
Code violating the rule here
#pragma warning restore IDISP004 // Don't ignore created IDisposable

Or put this at the top of the file to disable all instances.

#pragma warning disable IDISP004 // Don't ignore created IDisposable

Via attribute [SuppressMessage].

[System.Diagnostics.CodeAnalysis.SuppressMessage("IDisposableAnalyzers.Correctness", 
    "IDISP004:Don't ignore created IDisposable", 
    Justification = "Reason...")]