title: add method call to each method in a class
body: <p>I have class with many methods:</p>
  
  <pre><code>public class A {
      public string method1() {
          return "method1";
      }
      public string method2() {
          return "method2";
      }
      public string method3() {
          return "method3";
      }
      .
      .
      .
      public string methodN() {
          return "methodN";
      }
  }
  </code></pre>
  
  <p>I would like to add call to doSomething() in each method, for example:</p>
  
  <pre><code>public string methodi() {
      doSomething();
      return "methodi";
  }
  </code></pre>
  
  <p>What is the best way to do so? Is there any suitable design pattern?</p>