public sealed class MarginsFConverter : ExpandableObjectConverter

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

public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
		{
			if (destinationType == null)
			{
				throw new ArgumentNullException("destinationType");
			}
			if ((destinationType == typeof(string)) && (value is MarginsF))
			{
				MarginsF margins1 = (MarginsF) value;
				if (culture == null)
				{
					culture = CultureInfo.CurrentCulture;
				}
				string text1 = culture.TextInfo.ListSeparator + " ";
				TypeConverter converter1 = TypeDescriptor.GetConverter(typeof(float));
				string[] textArray1 = new string[4];
				int num1 = 0;
				
				textArray1[num1++] = converter1.ConvertToString(context, culture, margins1.Left);
				textArray1[num1++] = converter1.ConvertToString(context, culture, margins1.Right);
				textArray1[num1++] = converter1.ConvertToString(context, culture, margins1.Top);
				textArray1[num1++] = converter1.ConvertToString(context, culture, margins1.Bottom);
				return string.Join(text1, textArray1);
			}

            if ((destinationType == typeof(InstanceDescriptor)))
            {
                if (value is MarginsF)
                {
                    MarginsF margins2 = (MarginsF)value;
                    Type[] typeArray1 = new Type[4] { typeof(float), typeof(float), typeof(float), typeof(float) };
                    ConstructorInfo info1 = typeof(MarginsF).GetConstructor(typeArray1);
                    if (info1 != null)
                    {
                        object[] objArray1 = new object[4] { margins2.Left, margins2.Right, margins2.Top, margins2.Bottom };
                        return new InstanceDescriptor(info1, objArray1);
                    }
                }
                else
                {
                    Type[] typeArray1 = new Type[4] { typeof(float), typeof(float), typeof(float), typeof(float) };
                    ConstructorInfo info1 = typeof(MarginsF).GetConstructor(typeArray1);
                    return new InstanceDescriptor(info1, null, false);
                }
            }

		    return base.ConvertTo(context, culture, value, destinationType);
		}