DataContractJsonSerializer.WriteObject Method (Stream, Object)
Assembly: System.Runtime.Serialization (in System.Runtime.Serialization.dll)
The type being serialized does not conform to data contract rules. For example, the DataContractAttribute attribute has not been applied to the type.
There is a problem with the instance being written.
The maximum number of objects to serialize has been exceeded. Check the MaxItemsInObjectGraph property.
.NET FrameworkSupported in: 4.5, 4, 3.5
.NET Framework Client ProfileSupported in: 4, 3.5 SP1
Portable Class LibrarySupported in: Portable Class Library
.NET for Windows Store appsSupported in: Windows 8
.NET for Windows Phone appsSupported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8
Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.