Differences between Dotnet2.0 and DotNet1.1:

1. Bulk Copy:
          
                Copying of Data from one data source to 
another data source in bulk like the sqlBulkCopy, this can 
read as Dataset, Data Table and Data Reader. It provides 
the fastest way to transfer the Data.

2. Batch Update:

                  Batch update can provide a huge 
improvement in the performance by making just one round 
trip to the server for multiple batch updates, instead of 
several trips if the database server supports the batch 
update feature. The UpdateBatchSize property provides the 
number of rows to be updated in a batch. This value can be 
set up to the limit of decimal.


3. Data Paging:

                   Now command object has a new execute 
method called ExecutePageReader. This method takes three 
parameters - Command Behavior, start Index, and page Size. 
So if you want to get rows from 101 - 200, you can simply 
call this method with start index as 101 and page size as 
100.

4. Connection Details:
                    Now you can get more details about a 
connection by setting Connection's Statistics Enabled 
property to True. The Connection object provides two new 
methods - Retrieve Statistics and Reset Statistics. The 
Retrieve Statistics method returns a Hash Table object 
filled with the information about the connection such as 
data transferred, user details, curser details, buffer 
information and transactions.
5. DataSet.RemotingFormatProperty:
                     When DataSet.RemotingFormat is set to 
binary, the Dataset is serialized in binary format instead 
of XML tagged format, which improves the performance of 
serialization and deserialization operations significantly.
6. Data Table’s Load and Save Methods:
                      In this Load method can load data 
from objects such as XML in to Database objects and can 
save them into the persistent data.
7. New Controls:
                       DataGridView, Data Navigator, Data 
Connector.
8. Customized Data Provider:
                       By providing the factory classes now 
ADO.NET extends its support to custom data provider. Now 
you don't have to write a data provider dependent code. You 
use the base classes of data provider and let the 
connection string does the trick for you.
9. Data Readers New Execute Methods:
                        Execute Reader, ExecutePageReader, 
and ExecuteResultSet; Execute Row, Execute Scalar, 
ExecuteXmlReader, and ExecuteNonQuery.
	Fx1.0	Fx1.1	Fx2.0	Fx3.0	Fx3.5
Engine Core:	CLR1.0
VB.Net,C#	CLR1.1
VB.Net,C#,J#,C++	CLR2.0
VB.Net,C#,J#,C++,Generics	CLR2.0
VB.Net,C#,J#,C++,Generics	CLR2.0
Linq, c#.
Functional Libraries:	Ado.Net 1.0,ASP.Net1.0,
XML,ASMX	Ado.Net 1.1,ASP.Net1.1,
XML,ASMX,WSE2.0	Ado.Net2.0,ASP.Net2.0,
XML,ASMX,WSE3.0	WCF,WS,WPF,WCS	ASP.Net
Ajax
Platform Technologies	95,Xp	95,Xp,Server2003
	+SqlServer2005	+SP3,SP4,Vista	+SP3,SP4,Vista
Developer Tools	.Net2002	.Net2003	2005	
	orcas
Features of DotNet3.5:
Features


1. Faster garbage Collection.

2. 62bit client Improvements.

3. Thread pool performance improvements.
Base Class Library – New Class Additions


BigInteger, HashSet and DateTime2 types

4. NSA Suite”B” and FIPs compliant cryptography

5. Lightweight Reader/Writer Lock Classes

6. Anonymous and Named Pipes IO Classes

7. Integration with Event Tracing for Windows

8. New Addin hosting model for extensibility 

Language Integrated Query (LINQ)


Deep integration of LINQ data-awareness into the 
programming languages and framework.
Workflow Enabled Services – Process and Messaging together


Using workflow to provide for durable and long-running 
services. New Tools, WF activities and new programming 
model classes have been added to simplify building workflow-
enabled services using WF and WCF. This allows a .NET 
Framework developer to build business logic for a service 
using WF and expose messaging from that service using WCF. 
These improvements not only provide tools for this scenario 
but they reduce the amount of glue code that was previously 
required.
Web 2.0 Friendly and AJAX Enabled WCF Services


Ajax is a web development technique for making asynchronous 
exchanges of small amounts of data between browser and web 
service calls from the browser client script to the web 
server. A programming model is provided for building Ajax 
style web applications using WCF services. An HTTP 
programming model is also provided allowing for REST style 
web services.

Visual Studio Developer Tools for WF, WCF and in Visual 
Studio “Orcas”

Visual Studio “Orcas” has built in tools for web service 
authoring with WCF and for building workflow enabled 
software with WF. There are new project templates for WCF 
services, WF business logic, workflow enabled services, and 
AJAX services. The templates are conveniently set up to 
compile and run even before any custom code is added 
enabling .NET developers to get going quickly. There are 
also numerous other tools for developing with WF, WCF and 
WPF.