SfcCollection(T, K, ParentT).ISfcCollection.PrepareMerge Method
Prepares to merge fresh query results into the existing collection. Do not reference this member directly in your code. It supports the SQL Server infrastructure.
Assembly: Microsoft.SqlServer.Management.Sdk.Sfc (in Microsoft.SqlServer.Management.Sdk.Sfc.dll)
A new internal collection is created that will be merge into and eventually replaces the current collection. When the ISfcCollection.FinishMerge method is called, the new collection becomes the inner collection.