How to Clear All text Boxes and DropDownList in Asp.net(Web Applications)

Public Sub clearAlltextbox(ByVal fr As ControlCollection)

        For Each c As Control In fr

           If c.ToString.Equals("System.Web.UI.WebControls.TextBox")  Then

                CType(c, TextBox).Text = ""

            End If

            If c.ToString.Equals("System.Web.UI.WebControls.DropDownList") Then

                CType(c, DropDownList).ClearSelection()

            End If

        Next

    End Sub

How to Call:

if Form Controls:

clearAlltextbox(Me.Form.Controls)

if Panel Conrtols:

clearAlltextbox(Me.Panel2.Controls)