C# - Error CS0246 - The type or namespace name 'DataMember' could not be found

If you get this error, you are missing an assembly reference.

Fix with: Project ... Add Reference ... System.Runtime.Serialization.dll



The class DataMemberAttribute, which can be found in the namespace System.Runtime.Serialization, is implemented in the assembly System.Runtime.Serialization.dll.
That assembly is not referenced by default.

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© Richard McGrath