Creating, Altering, and Removing Indexes
In the SQL Server Management Objects (SMO) hierarchy, indexes are represented by the Index object. The indexed columns are represented by a collection of IndexedColumn objects represented by the IndexedColumns property.
You can create an index on a XML column by specifying the IsXmlIndex property of the Index object.
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工作
How to: Create a Non-Clustered, Composite Index in Visual Basic .NET
How to: Create an XML Index in Visual Basic .NET