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Lambda expression

Posted Date: 04 Jun 2008 Resource Type: Definitions Category: General

Posted By: shakti singh tanwar Member Level: Diamond
Rating:

Points: 8

Lambda expression is a new addition to already rich c# language# 2.0 introduced anonymous methods and lambda expressions are an enhancement to them.
A lambda expression is an anonymous function that can contain expressions and statements, and can be used to create delegates or expression tree types.
All lambda expressions use the lambda operator =>, which is read as "goes to". The left side of the lambda operator specifies the input parameters (if any) and the right side holds the expression or statement block. The lambda expression x => x * x is read "x goes to x times x." This expression can be assigned to a delegate type as follows:
delegate int del(int i);
del myDelegate = x => x * x;
int j = myDelegate(5); //j = 25
To create an expression tree type:
using System.Linq.Expressions;
// ...
Expression = x => x * x;
The => operator has the same precedence as assignment (=) and is right-associative.

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