Fix InvalidCastException when deserializing some dictionary types #42835
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Did this work in 3.1? |
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@danmosemsft support for non-string dictionary keys was added in 5.0 (this was not a regression from 3.1), if someone wants the feature to work on 3.1 and they specifically need one of the types fixed in this PR, they would have to use a daily build of .NET 6 or wait for .NET 6 preview 1. |
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@jozkee sounds good |
This was referenced Sep 30, 2020
Compilation error: ApiCompat shows Trim analysis error for IEnumerableConverterFactoryHelpers
#42902
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layomia
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Prevents
InvalidCastExceptionwhen deserializing the following dictionary types (exhaustive list) and the key type is nottypeof(string):typeof(IDictionary<,>)typeof(ImmutableDictionary<,>)IImmutableDictionary<,>)typeof(IReadOnlyDictionary<,>)The workaround for .NET 5 is to use a custom converter for these types, or use a different dictionary type.
Deserializing other dictionary types e.g.
class MyCustomDictionary : IDictionary<int, int>,Dictionary<DateTime, string>,class MyCustomReadOnlyDictionary : IReadOnlyDictionary<Guid, int>etc works fine.