title: Get shorted string from fullname with C#
body: <p>Please help me with c#
  to convert list of fullname
  Table 1:</p>
  
  <pre><code>Hoang Hai
  Hoang Vu Hiep
  Nguyen Tat Loc
  Pham Manh Quan
  Nguyen Tien Sy
  Bui Duc Tai
  Lu Quoc Duc
  Do Van Hung
  Pham Thi Thuy Ngan
  Nguyen Van Ngoc
  ...
  </code></pre>
  
  <p>Expected Output:</p>
  
  <pre><code>H.Hai
  V.Hiep
  T.Loc
  M.Quan
  T.Sy
  D.Tai
  Q.Duc
  V.Hung
  T.Ngan
  V.Ngoc
  ...
  </code></pre>
  
  <p>How can I get this?</p>