Reading unique elements from file in c#
<p>I have a file as</p>

<pre><code>outlook temperature Humidity  Windy  PlayTennis

sunny      hot        high     false   N

sunny      hot        high     true    N

overcast   hot        high     false   P

rain       mild       high     false   P

rain       cool       normal   false   P
</code></pre>

<p>I want to read only unique elements from each column.</p>

<p>My ouput should be:</p>

<pre><code> elements: occurence         
sunny : 2
overcast :1 
rain : 2
hot: 3
cold : ans so on
mild
high
normal
true
false
N
P
</code></pre>

<p>I want to store this in dictionary, as key value pair 
key would be my row element. value will be its column element.
Please help. </p>
