.NET Framework 4.6 and 4.5
This API supports the .NET Framework infrastructure and is not intended to be used directly from your code.
For a description of this member, see IList.Add.
This member is an explicit interface member implementation. It can be used only when the FreezableCollection<T> instance is cast to an IList interface.
Supported in: 4.6, 4.5, 4, 3.5, 3.0
.NET Framework Client Profile
Supported in: 4, 3.5 SP1
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