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FAQ: When do COM references have to be released?

Question

When do COM references have to be released?

Answer

In .NET ArcGIS Engine applications, to ensure a COM object is released when it goes out of scope, use the ComReleaser class for all singletons. The ComReleaser class can be found in the ESRI.ArcGIS.ADF.dll assembly.

Note:
Explicitly releasing COM references is not necessary for ArcGIS Desktop applications.