What is ADO.NET?What are the key components of ADO.NET?What are the ADO.NET namespaces?What is the meaning of object pooling?What are the differences between ADO.NET and classic ADO?Explain the architecture of ADO.NET.?What is a Connection String in ADO.NET C#??How do you establish a database connection using ADO.NET?Explain the concept of Connection Pooling in ADO.NET C#.Differentiate between Object pooling and Connection pooling in C#?What is a DataReader in ADO.NET? Explain with C# example?What is the functionality of CommandBehavior.SchemaOnly?Why CommandBehavior.SingleResult flag is used in ADO.NET?What does CommandBehavior.SingleRow do in ADO.NET?How we can get multiple results by DataReader using same connection in C#?How can we force the connection object to close after my DataReader is closed?What is a DataSet in ADO.NET? Explain with C# example?What are typed and un-typed datasets in ADO.NET C#?Write down some of the characteristic of DataSet?What is the difference between dataSet and DataReader?Why is DataSet Slower than DataReader? Explain with Example.How does DataSet handle data in a disconnected environment?What is the Difference between connected and disconnected architectire?Explain HasChanges() method of DataSet in C#.Explain GetChanges() method with detaild C# Example.Explain RejectChanges() method with C# Example.Explain AcceptChanges() method with C# Example.What are the various methods provided by DataSet for XML in C#?What is the purpose of DataAdapter in ADO.NET?Explain the steps involved in retrieving data using DataAdapter.
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What are the key components of ADO.NET?

ADO.NET (ActiveX Data Objects .NET) consists of the following key components:

1. Connection: The Connection object establishes a connection to a data source, such as a database, XML file, or web service. It manages the connection string, which contains information about the data source location, credentials, and other connection parameters.

2. Command: The Command object represents an SQL statement or stored procedure that is executed against the data source. It allows you to execute queries, perform data manipulation operations (such as insert, update, and delete), and call stored procedures. The Command object includes properties for the SQL statement, parameters, and execution behavior.

3. DataReader: The DataReader object provides a forward-only, read-only stream of data from the data source. It is optimized for retrieving large result sets quickly and efficiently. The DataReader allows you to sequentially read data rows as they are retrieved from the data source, providing a lightweight and efficient way to access data.

4. DataAdapter: The DataAdapter acts as a bridge between the DataSet and the data source. It retrieves data from the data source and populates a DataSet, and it also updates the data source with changes made to the DataSet. The DataAdapter uses Command objects to execute queries and commands against the data source, and it provides methods for filling a DataSet, updating the data source, and handling data synchronization.

5. DataSet: The DataSet is an in-memory representation of data that provides a disconnected, cached view of data retrieved from the data source. It can store multiple tables, relationships between tables, and constraints. The DataSet allows you to work with data independently of the data source, making it suitable for scenarios where data needs to be manipulated, cached, or shared across different layers of an application.

6. DataTable: The DataTable represents a single table of data within a DataSet. It consists of rows and columns that store the actual data. DataTables provide methods and properties for querying, sorting, and manipulating data. Multiple DataTables can exist within a single DataSet, and relationships can be defined between DataTables using DataRelations.

7. DataRelation: The DataRelation object represents a relationship between two DataTables within a DataSet. It defines how the data in one DataTable is related to the data in another DataTable. DataRelations allow you to navigate and query related data across multiple DataTables within a DataSet.

These components work together to provide a comprehensive data access framework in ADO.NET. They allow you to establish connections to data sources, execute queries and commands, retrieve and manipulate data, and manage relationships between data tables. ADO.NET offers flexibility, performance, and scalability for building data-driven applications.

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