[SOLVED] The type or namespace name 'log4net' could not found??

Hello Friends,

While compiling my C# code I am getting an error as -

The type or namespace name 'log4net' could not found(are you missing a using directive or an assembly reference?)

I am using VS2008 and i also tried to change the .net framework from 2.0 to 3.5... I took the reference from the following link-

http://social.msdn.microsoft.com/Forums/vstudio/en-US/f407e499-fd4a-4968-b7c7-aadf01b33f0c/the-type-or-namespace-name-log4net-could-not-be-found-but-it-could?forum=netfxbcl

Still the error persists.. 

If anyone knows how to solve the error then please help me?????