title: I want to get value from other cs file
body: <p>I want to get value from other cs file.</p>
  
  <p>for example. there are two cs files in same Project. <br>
  one is A.cs, another is B.cs</p>
  
  <p>And there is a variable in A.cs</p>
  
  <pre><code>int a = 1;
  </code></pre>
  
  <p>i want to use variable 'a' in B.cs, like this</p>
  
  <pre><code>int b = a;
  </code></pre>
  
  <p>then what should i do?</p>