Project Description: ? 
Try to find the content in every file in your folder.

Support File Type Now: 
xml,txt,xsd,html,pdf,config,cs,csproj,manifest,resx,settings,sln,user,vb,vspscc,vssscc,xaml.
xls,xlsx,ppt,pptx,docx.doc(only support strings),c,cc,cpp,h.

Using technology: 
C#,Task,Regular expression,WPF,Open Xml.

Useful tips 
The search box support Regular expression. 
The following wildcard specifiers are permitted in the filter parameter : 
*   Zero or more Characters 
?   Exactly one character. 
Double click the item in the searched item , can open the file in notepad.exe. 
Support multiple search directory , split them by ;