//Clear All items, comboboxes, checkboxes etc...
private void ClearListButton_Click(object sender, RoutedEventArgs e)
{
rtb.Document.Blocks.Clear();
CarPrice.Clear();
InsurancePrice.Clear();
Brand.Clear();
Type.Clear();
SenderName.SelectedIndex = 0;
AssistanceType.SelectedIndex = 0;
AdreserType.SelectedIndex = 0;
GlassPrice.SelectedIndex = 0;
NnwPrice.SelectedIndex = 0;
ValType.SelectedIndex = 0;
AcDisc.SelectedIndex = 0;
OwnCont.SelectedIndex = 0;
GrNet.SelectedIndex = 0;
OcComboBox.SelectedIndex = 0;
ConstInsuranceValue.SelectedIndex = 0;
OcCheckBox.IsChecked = false;
AcCheckBox.IsChecked = false;
NnwCheckBox.IsChecked = false;
GlassCheckBox.IsChecked = false;
AssCheckBox.IsChecked = false;
AtHomeLimit.IsChecked = false;
KmLimit.IsChecked = false;
BorderRange.IsChecked = false;
InsuranceCompany = "";
Recpient = "";
CarBrand = "";
CarType = "";
DiscountOC = "";
CarPriceAC = "";
GrossNetAC = "";
OwnContributionAC = "";
DiscountAC = "";
ValuationTypeAC = "";
NnwTypes = "";
AssistanceRange = "";
CarGlass = "";
InsurancePriceEnd = "";
Sender = "";
AssistanceTypeCompany = "";
InsuranceChange = "";
FirstPartOfMail = "";
SecondPartOfMail = "";
ThirdPartOfMail = "";
FourthPartOfMail = "";
FourthAndHalfPartOFMail = "";
FifthPartOfMail = "";
SixthPartOfMail = "";
SeventhPartOfMail = "";
EightPartOfMail = "";
AtHomeLimitation = "";
KmLimitation = "";
BorderRangePl = "";
id = 0;
}