I was working on an old SSIS project in Microsoft SQL Server Business Intelligence Development Studio 2005 and when I opened a package I got the error:

Error loading ‘TestPackage 7.database’ : Deserialization failed: The method or operation is not implemented.


The folder containing the project file MyProject.dtproj, should contain only one *.database file, named exactly like the project name, like MyProject.database, remove all other *.database files and make sure, you’re versioning system does not contain any *.database files, exclude them from you’re versioning system.

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