MemoryLeak in AxHost

[pedromcrocha]

.NET version

7.0
8.0

Did it work in .NET Framework?

Yes

Did it work in any of the earlier releases of .NET Core or .NET 5+?

not tested

Issue description

AxHost does not dispose correctly.
is retained in ContainingControl and in private readonly AxHost _host in OleInterfaces class

with
this.axCoPDFXCview1.Dispose() //axCoPDFXCview1 my class that derive from AxHost

and if i do
this.axCoPDFXCview1.ContainingControl = null;
this.axCoPDFXCview1.Dispose();

i cannot get rid of AxHost.OleInterfaces

Steps to reproduce

[elachlan]

CC: @JeremyKuhne

[elachlan]

@pedromcrocha is there a chance you could create a small reproduction project?

[pedromcrocha]

https://github.com/pedromcrocha/MemoryLeak_AxHost

[elachlan]

@Olina-Zhang could your team please verify?

[Olina-Zhang]

Hi @pedromcrocha we tried to use the sample: https://github.com/pedromcrocha/MemoryLeak_AxHost you provided to reproduce it, but project is missing COM dependencies, didn't find them in our testing machine. Could you please give some guidance how to reproduce it? Thanks!

[pedromcrocha]

Hi @Olina-Zhang , i remove some references, and join a video

MemoryLeak_AxHost.mp4

[Olina-Zhang]

I still have some problem when building that sample, missing COM dependencies. Is it necessary to install a third-party app?

[pedromcrocha]

Hi @Olina-Zhang , no need do install a third-party, just follow the next video

MemoryLeak_AxHost_v2.mp4

[JeremyKuhne]

@pedromcrocha I believe this is ok with .NET 9 now as we don't cache object wrapped interfaces.

[dotnet-policy-service]

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