15 Seconds : Creating a Data Access Layer in .NET - Part 2 - 1 views
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This means the Primary Key will not contain the actual auto-increment from the database until the DataSet is updated. Therefore, the auto-increment value is relative to the DataSet only. For this reason, I have found it wise to set the AutoIncrementSeed to 0 and the AutoIncrementStep to -1.
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A good tutorial on DataSets - gives a very good suggestion to set
