System.Data.Merger.Merger C# (CSharp) Method

        internal Merger(DataSet dataSet, bool preserveChanges, MissingSchemaAction missingSchemaAction)
        {
            _dataSet = dataSet;
            _preserveChanges = preserveChanges;

            // map AddWithKey -> Add
            _missingSchemaAction = missingSchemaAction == MissingSchemaAction.AddWithKey ?
                MissingSchemaAction.Add :
                missingSchemaAction;
        }