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Editorial Team
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Asked: 2026-06-11T02:10:35+00:00

I’m using @mythz’s ServiceStack.Text (package version 2.9) TypeSerializer for serialization and deserialization to deep-copy

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I’m using @mythz’s ServiceStack.Text (package version 2.9) TypeSerializer for serialization and deserialization to deep-copy objects in a cache. I find myself getting this error on deserialization:

Type definitions should start with a ‘{‘, expecting serialized type
‘MetadataCollection’, got string starting with: []

Where MetadataCollection is our custom collection class that implements IEnumerable. I look at the serialized string for my test, and the Metadata property (type MetadataCollection) property on my serializer is indeed serialized as:

,Metadata:[],

Which seems correct to me, since this collection is empty. Is there something I can do to make this work?

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1 Answer

  1. Editorial Team

    This is due to a bug/missing feature in ServiceStack.Text package version 2.x. I upgraded to ServiceStack.Text package version 3.9.3 and all is well.

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