title: How to add field to a Shapefile using DotSpatial?
body: <p>I tried searching the web to find a sample of showing how to add a Field to attribute table of an existing shapefile. For example I have a Shapefile at </p>
  
  <pre><code>C://data/Streets.shp
  </code></pre>
  
  <p>and need to add two field <code>L_CITY</code> and <code>R_CITY</code> both text and 50 characters limit. How can I do this in DotSpatial?</p>