C#

  Dim cert_personal As X509Certificate2 = Nothing<br />
        Try<br />
            cert_personal = New X509Certificate2<br />
            cert_personal.Import(Application.StartupPath  & "\Chain\Personal.pfx","My Password" , (X509KeyStorageFlags.UserKeySet Or X509KeyStorageFlags.Exportable))<br />
        Catch ex As Exception<br />
            MsgBox(ex.Message)<br />
        End Try<br />
        If cert_personal Is Nothing Then<br />
            Return False<br />
        End If<br />
<br />
        ''XXXXXXXXXXXXXXXXXXXXXXXX PERSONAL XXXXXXXXXXXXXXXXXXXXXXXXXXXXX<br />
        Dim store As New X509Store(StoreName.My, StoreLocation.CurrentUser)<br />
        Try<br />
            store.Open(OpenFlags.ReadWrite)<br />
            Dim findVal As String = cert_personal.Thumbprint 'Thumbprint <br />
            Dim certColl As X509Certificate2Collection = store.Certificates.Find(X509FindType.FindByThumbprint, findVal, False)<br />
<br />
            If certColl.Count <= 0 Then<br />
                store.Add(cert_personal)<br />
            <br />
            End If<br />
        Catch ex As Exception<br />
            MsgBox(ex.Message)<br />
        Finally<br />
            store.Close()<br />
        End Try<br />
<br />