title: Use regular expression to search in arabic text in C#
body: <p>I want to create search module in Arabic text by regular expression and C#. Can any one help me? I don't have any idea.
  In my search module, when user inert "من" without Alphabet (ُ َ ِ ), module return مُن مِن مَن and others. how to create this module?
  thanks.</p>