title: Make String.Contains() case insensitive
body: <p>I have made a software in vb.net that has a specific purpose.</p>
  
  <p>It has to compare two strings at a particular point, say they are x and y. The code is</p>
  
  <pre><code>If x.Contains(y) then
  'do things here
  End If
  </code></pre>
  
  <p>If y is 'Hello' and x is 'hello there', then the if statement must be true according to my requirement, but it turns out the Contains() control is case sensitive.</p>
  
  <p>How do I make it case insensitive?</p>
  
  <p>EDIT:
  My question is in vb.net and not C#. Though they are mostly similar, I do not understand C# and don't know how to implement the answers in my scenario because both of these are different langauages. So my question is not duplicate of the one mentioned.</p>