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If you aren't using data binding, and are saving changes for related tables, you have to manually instantiate a variable of the auto-generated dataset).
When you merge datasets, new records in the source dataset are added to the target dataset.
This means that if you try to update the original data source with the target dataset, it might not be able to find the original row to update.
You can prevent a concurrency violation by filling another dataset with the updated records from the data source and then performing a merge to prevent a concurrency violation.
Data Views Describes how to create and work with and work with Data View events. Updating Data Sources with Data Adapters Describes how to resolve changes to the data in a Data Set back to the data source.
Using XML in a Data Set Describes how the Data Set interacts with XML as a data source, including loading and persisting the contents of a Data Set as XML data. Adding Existing Constraints to a Data Set Describes how to populate a Data Set with primary key information from a data source.
If the dataset contains constraints (such as foreign keys or non-nullable constraints), it's possible that the record can temporarily be in an error state as you update it.A Data Set represents a complete set of data including the tables that contain, order, and constrain the data, as well as the relationships between the tables.There are several ways of working with a Data Set, which can be applied independently or in combination.Handling Data Set Events Describes the events of a Data Set and how to use them.Typed Data Sets Discusses what a typed Data Set is and how to create and use it.