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 ADO.NET namespaces?

In C#, ADO.NET (ActiveX Data Objects .NET) is a widely used technology for interacting with databases. It provides a set of namespaces, which are like containers for related classes and functionality, to make working with databases more accessible. Let's explore some of the key ADO.NET namespaces:

System.Data:

This namespace is the foundation of ADO.NET and contains essential classes and interfaces for working with data. It includes DataTable for representing data in memory, DataSet for holding multiple tables, and DataView for filtering and sorting data.

System.Data.Common:

This namespace contains common classes and interfaces that can be used across different database providers. It helps in writing more portable database code that can work with multiple databases.

System.Data.SqlClient:

This namespace is specifically designed for connecting to Microsoft SQL Server databases. It contains classes like SqlConnection for establishing connections, SqlCommand for executing SQL queries, and SqlDataAdapter for retrieving and updating data.

System.Data.OleDb:

This namespace contains classes that are used for accessing data from OLE DB data sources. It includes classes for OleDbConnection (OLE DB connection), OleDbCommand (OLE DB command), OleDbDataReader (OLE DB data reader), and OleDbDataAdapter (OLE DB data adapter).

System.Data.Odbc:

Similar to System.Data.OleDb, this namespace allows you to connect to databases using the Open Database Connectivity (ODBC) standard. ODBC is another generic way to access different databases.

System.Data.OracleClient:

System.Data.OracleClient is a part of C# programming that acts like a toolkit, helping C# programs communicate with Oracle databases. Imagine you have a C# program, and you want it to store or retrieve information from an Oracle database (a big, organized storage system). This toolkit, System.Data.OracleClient, provides tools and methods to make that conversation possible.

System.Data.SQLite:

System.Data.SQLite is a component in C# that helps your C# programs work with SQLite databases. To understand this, imagine you have a computer program written in C#, and you need to store and manage data. You can think of System.Data.SQLite as a special toolbox that provides tools and functions for your C# program to communicate with and manage a particular type of database called SQLite.

System.Data.SqlTypes:

This namespace includes data types that correspond to SQL Server data types. It's useful when dealing with data that has specific SQL Server data types.

System.Data.SqlServerCe:

This namespace is for SQL Server Compact Edition, a lightweight, embedded database engine. It's suitable for desktop and mobile applications.

System.Xml:

While not exclusively an ADO.NET namespace, it's worth mentioning because ADO.NET often deals with XML data, and this namespace provides classes for working with XML.

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