WeakReference in (Mono C#) staying alive even after GC.Collect

Asked Sep 06 '16 at 17:06

Active Sep 06 '16 at 17:06

Viewed 384 times

The following piece of code written in C# and executed on Mono Droid, isn't working as expected.

    var strongRef = "abc";
    WeakReference weakRef = new WeakReference (strongRef);
    strongRef = null;
    System.GC.Collect (2,GCCollectionMode.Forced);
    System.Diagnostics.Debug.WriteLine ("Target:" + weakRef.Target + " IsAlive:" + weakRef.IsAlive);

Expected O/P: Target:null IsAlive:false

Actual O/P: Target:abc IsAlive:true

asked Sep 06 '16 at 17:06

zafar

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If Mono works anything like .NET in this regard, `"abc"` is an interned string, it will *never* be collected. – Lucas Trzesniewski Sep 06 '16 at 17:07
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Try `new object()` instead of a string. – vcsjones Sep 06 '16 at 17:08
@LucasTrzesniewski and @vcsjone. Replaced `abc` with `new Object()` still behaves the same – zafar Sep 06 '16 at 17:41
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The problem was with the method stack. Found the [answer](http://stackoverflow.com/questions/11417283/strange-weakreference-behavior-on-mono?rq=1) – zafar Sep 07 '16 at 17:37

WeakReference in (Mono C#) staying alive even after GC.Collect

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