How to check if a datareader is closed or opened? IsClosed()

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Is datareader faster than datatable?

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can anybody show me the structure of ADO.NET

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What do you know about ado.net's methods?

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If we want to connect to many databases in dataaccess layer such as MSAccess,Sql server,oracle means not to a particular database depends on condition we have to connect to appropriate database in this scenario if we without changing code Ho wdo you handle this situation?

4 Answers   Honeywell,

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What is csdl entity framework?

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What is ado data control?

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how you will deal result set? How do you sort a dataset?If a dataset contains 100 rows, how to fetch rows between 5 and 15 only?

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Describe ado.net object model in detail.

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What is basic use of data view?

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How do we invoke queries from the application

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How to aggregating data across related tables?

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