1) Simple Query
var CustQuery= from cust in customers
select cust;
2) Where Clause

var DelhiCustomerQuery = from cust in customers
where cust.City == “Delhi”
select cust;
Logical Operator
where cust.City==”delhi” && cust.Name == “mumbai”
3) Order by
var DelhiCustomerQuery = from cust in customers where cust.City == “Delhi” orderby cust.Name ascending
select cust;
4) Group by
var QueryGroupByCity = from cust in customers group cust by cust.City
Now [...]

Following are the 3 new Key features in .net 4.0
1) Windows work flow and WCF 4.0:- This is a major change in 4.0.
In WCF they have given following features :-

Dynamic Service and End Point discovery – The problem was faced in earlier version of WCF that if theend point has been changed at service [...]

In .net 4.0 dynamic keyword has been introduced. This allows you to define the object without specifying its type. So let say we have following string :-

string s = “sachin”;

We can define another variable without specifying the type

dynamic d = s;

Now this can also be done through var keyword so whats the difference?
The difference is [...]