title: Search a case sensitive string that takes from text box when using IF statement
body: <p>I have a DataGridView with some data, I want to "Do some thing" <strong>if</strong> the string (for example, Jon) in text box is Jon or JON or jon or ... My code:</p>
  
  <pre><code>For Each dr As DataGridViewRow In DataGridView1.Rows
            If dr.Cells(1).Value = TextBox1.Text Then
              'Do some thing
          End If
  Next
  </code></pre>