No need to keep Pidgin minimized in Mint/Ubuntu

A problem which i faced when using Pidgin IM in Linux is it needs to keep minimized in the task bar in order to receive incoming messages. But in GoogleTalk in windows it keeps the client online even if we closed the window.

Solution is in preferences. In pidgin Tools -> Preferences -> Interface -> Show System Tray Icon. Set its value to "Always". It will create a Pidgin Icon in the System Tray. Now u can simply close the pidgin window without being disconnected.

Java + Eclipse + How to use existing libraries

You can find a good blog post regarding the topic here.

Check whether there's some given SET of characters is in a String (C#)

System.Text.RegularExpressions.Regex.IsMatch(MyString, @"[^a-z0-9A-Z+#.]")

"^" sign to take the rest of the characters which are not in the set defined.