Hi, im using propertygrid and trying to show boolean property with other string values than true/false, i made boolenconverter for this, it works fine when i use combobox to change value, but i get inner propertygrid error when i doubleclick to change value in propertygrid: Invalid property value! Details: Cannot widen from target type to primitive type. public class BaseProps{ private bool test; [TypeConverter(typeof(BoolNameConverter2))] public bool Value { get {return test;} set {test = value;} } } public class BoolNameConverter2 : StringConverter { private const string m_trueDisplayName = "on"; private const string m_falseDisplayName = "off"; public override bool CanConvertTo(ITypeDescriptorContext context, System.Type destinationType) { if (destinationType == typeof(bool)) return true; return base.CanConvertTo(context, destinationType); } public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, System.Type destinationType) { if (value is bool && destinationType == typeof(System.String)) { return (bool)value ? m_trueDisplayName : m_falseDisplayName; } return base.ConvertTo(context, culture, value, destinationType); } public override bool CanConvertFrom(ITypeDescriptorContext context, System.Type sourceType) { if (sourceType == typeof(string)) return true; return base.CanConvertFrom(context, sourceType); } public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) { if (value is string) { return (string)value == m_trueDisplayName ? true : false; } return base.ConvertFrom(context, culture, value); } public override bool GetStandardValuesSupported( ITypeDescriptorContext context) { return true; } public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) { return new StandardValuesCollection (new string[]{m_trueDisplayName, m_falseDisplayName}); } public override bool GetStandardValuesExclusive( ITypeDescriptorContext context) { return true; } } What could be the problem? Has anybody had similar problem and has solution? How to fix it? Thanks Deglimmer