title: Function start doesn't return a value on all code paths. A null reference exception could occur at run time when the result is used
body: <p>can you help its say's (Function 'Start' doesn't return a value on all code paths. A null reference exception could occur at run time when the result is used.)</p>
  
  <pre><code>Private Function Start() As Object
      Dim thr As Integer = TextBox4.Text
      Dim Threading As Integer = Nothing
      If CheckBox1.Checked = True Then
          Threading = thr + 300
      Else
          Threading = thr
      End If
      While Not stopp
          Try
              Try
                  Dim i As String = Geting("https://i.instagram.com/api/v1/users/search?q=" &amp; TextBox5.Text &amp; "&amp;access_token=" &amp; Guid.NewGuid.ToString.ToUpper &amp; "/")
                  If i.Contains("""username"": """ &amp; TextBox5.Text &amp; """") Or Nothing Then
                      intt += 1
                      Me.Invoke(Sub() TextBox3.Text = intt)
                  Else
                      If ChangeUserName(TextBox5.Text) Then
                          Me.Invoke(Sub() Label1.Text = "username claimed " &amp; TextBox5.Text)
                          stopp = True
                      End If
                  End If
              Catch ex2 As Exception
              End Try
              Thread.Sleep(Threading)
          Catch ex As Exception
          End Try
      End While
  End Function
  </code></pre>