About the Extension Method in net3.5

The extension method works with Lambda to facilitate data query.CodeRight:

 
Ienumerable <String>X =NewList <String> {"1","Zzl","Good"};// Assign values to objects
 

 
Foreach(VAR infoInX. foruser ("Zzl"))// Filter the character zzl from it
 

 
{
 

 
Response. Write (Info );
 

 
}
 

 
Public Static ClassFilter
 

 
{
 

Public StaticIenumerable <String> Foruser (ThisIenumerable <String>Qry,StringUsername)
 

 
{
 

 
ReturnFromInQry
 

 
Where
 

 
A. Contains (username. tolower ())
 

 
Select;
 

 
}
 

 
}
 

AboveProgram, For the string type, the extension method is created, the method to query the string list!

Let's talk about the extension methods in JS later.