The Weird and The Wonderful

ptotal = Double.Parse(Me.txttA.Text) + Double.Parse(Me.txttB.Text) + Double.Parse(Me.txttC.Text) + _
                         Double.Parse(Me.txttD.Text) + Double.Parse(Me.txttE.Text) + Double.Parse(Me.txttF.Text) + _
                         Double.Parse(Me.txttG.Text) + Double.Parse(Me.txttH.Text) + Double.Parse(Me.txttI.Text) + _
                         Double.Parse(Me.txttA0.Text) + Double.Parse(Me.txttAA.Text) + Double.Parse(Me.txttAB.Text) + _
                         Double.Parse(Me.txttAC.Text) + Double.Parse(Me.txttAD.Text) + Double.Parse(Me.txttAE.Text) + _
                         Double.Parse(Me.txttAF.Text) + Double.Parse(Me.txttAG.Text) + Double.Parse(Me.txttAH.Text) + _
                         Double.Parse(Me.txttAI.Text) + Double.Parse(Me.txttB0.Text) + Double.Parse(Me.txttBA.Text) + _
                         Double.Parse(Me.txttBB.Text) + Double.Parse(Me.txttBC.Text) + Double.Parse(Me.txttBD.Text) + _
                         Double.Parse(Me.txttBE.Text) + Double.Parse(Me.txttBF.Text) + Double.Parse(Me.txttBG.Text) + _
                         Double.Parse(Me.txttBH.Text) + Double.Parse(Me.txttBI.Text) + Double.Parse(Me.txttC0.Text) + _
                         Double.Parse(Me.txttCA.Text) + Double.Parse(Me.txttCB.Text) + Double.Parse(Me.txttCC.Text) + _
                         Double.Parse(Me.txttCD.Text) + Double.Parse(Me.txttCE.Text) + Double.Parse(Me.txttCF.Text) + _
                         Double.Parse(Me.txttCG.Text) + Double.Parse(Me.txttCH.Text) + Double.Parse(Me.txttCI.Text) + _
                         Double.Parse(Me.txttD0.Text) + Double.Parse(Me.txttDA.Text) + Double.Parse(Me.txttDB.Text) + _
                         Double.Parse(Me.txttDC.Text) + Double.Parse(Me.txttDD.Text) + Double.Parse(Me.txttDE.Text) + _
                         Double.Parse(Me.txttDF.Text) + Double.Parse(Me.txttDG.Text) + Double.Parse(Me.txttDH.Text) + _
                         Double.Parse(Me.txttDI.Text) + Double.Parse(Me.txttE0.Text)

double ptotal = 0;

foreach(Control ctrl in this.controls)
{
  if(ctrl is TextBox)
    ptotal += Double.Parse(ctrl.Text);
}