using keyword C# with Example



using keyword C# with Example

When an object implements the IDisposable interface, it can be created within the using syntax: 
using (var foo = new Foo()) 
{ 
// do foo stuff 
} // when it reaches here foo.Dispose() will get called 
public class Foo : IDisposable 
{ 
public void Dispose() 
{ 
Console.WriteLine("dispose called"); 
} 
} 
View demo 
using is syntatic sugar for a try/finally block; the above usage would roughly translate into: 
{ 
var foo = new Foo(); 
try 
 

{ 
// do foo stuff 
} 
finally 
{ 
if (foo != null) 
((IDisposable)foo).Dispose(); 
} 
} 

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