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public class BaudRateConverter : TypeConverter
{
    private ArrayList values;

    public BaudRateConverter()
    {
        values = new ArrayList(new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 });
    }

    public override bool GetStandardValuesSupported(ITypeDescriptorContext context)
    {
        return true;
    }

    public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context)
    {
        StandardValuesCollection svc = new StandardValuesCollection(values);
        return svc;
    }

    public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
    {
        if (sourceType == typeof(string))
            return true;
        else
            return base.CanConvertFrom(context, sourceType);
    }

    public override object ConvertFrom(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value)
    {
        if (values.GetType() == typeof(string))
        {
            int newVal = int.Parse((string)value);
            if (values.Contains(newVal))
                return newVal;
            else
                return base.ConvertFrom(context, culture, value);
        }
        return base.ConvertFrom(context, culture, value);
    }

    public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
    {
        if (destinationType == typeof(string))
            return true;
        else
            return base.CanConvertTo(context, destinationType);
    }

    public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType)
    {
        if (destinationType == typeof(string))
            return string.Format("{0}", value);
        else
            return base.ConvertTo(context, culture, value, destinationType);
    }

    public override bool IsValid(ITypeDescriptorContext context, object value)
    {
        return true;
    }
}