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 ColumnDefinitionCollection 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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