Question

how to make the Difference between managed and unmanaged object in .net framework

Asked by: PHD

Hello,

I red that the garbage collector cleanup the memory for managed object but not for the unmanaged.
I also red that sqlconnection is unmanaged.

Is there a way or a rules to distinguish the managed and unmanaged object or resources ?

Thank you.

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Asked On
2007-11-08 at 00:55:54ID22946834
Tags

managed

,

unmanaged

,

between

,

difference

Topics

.NET Framework 2.x

,

.Net Editors & IDEs

,

Microsoft Visual C#.Net

Participating Experts
3
Points
500
Comments
5

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Answers

 

by: bungHocPosted on 2007-11-08 at 01:46:17ID: 20239996

 

by: ITTechSolverPosted on 2007-11-08 at 01:46:56ID: 20239997

You should consider, that managed resources are allocated by managed environment and then by system, but unmanaged only by the system. So that is why the garbage collector leaving this to be destroyed by "Closeing or Destroying" resource.
Here is some article how interoperability works: http://msdn2.microsoft.com/en-us/library/ms973872.aspx
SQLConnection object inherits from IDisposable interface, that provide Dispose() method, that as .NET documentation said is used for releaseing unmanaged resources, but it is often used to released heavy load of managed resources by developers.

I think the best way is to use this profiler to see how is your memory used:
http://msdn.microsoft.com/msdnmag/issues/05/01/CLRProfiler/

You can even see memory usage of .NET with Process Explorer (tab at process properties) in compare of working set:
http://www.microsoft.com/technet/sysinternals/utilities/processexplorer.mspx

 

by: PHDPosted on 2007-12-17 at 00:03:13ID: 20483440

it is ok for me

 

by: Computer101Posted on 2007-12-22 at 20:06:55ID: 20520543

Forced accept.

Computer101
EE Admin

20120131-EE-VQP-002

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