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# MgDataReader Class Reference
[MgDataReader]

Provides a forward-only, read-only iterator for reading computed data retrieved from a datastore. More...

Inherits MgReader.

List of all members.

## Detailed Description

Provides a forward-only, read-only iterator for reading computed data retrieved from a datastore.

Remarks:
  You must call the MgDataReader::ReadNext method before you can access any data.

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