PrimaryKeyTypeConverter.cs

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using System.ComponentModel;
using System.Globalization;
 
namespace System.Data;
 
internal sealed class PrimaryKeyTypeConverter : ReferenceConverter
{
    public PrimaryKeyTypeConverter()
        : base(typeof(DataColumn[]))
    {
    }
 
    public override bool GetPropertiesSupported(ITypeDescriptorContext context)
    {
        return false;
    }
 
    public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
    {
        if (!(destinationType == typeof(string)))
        {
            return base.CanConvertTo(context, destinationType);
        }
        return true;
    }
 
    public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
    {
        if (destinationType == null)
        {
            throw new ArgumentNullException("destinationType");
        }
        if (!(destinationType == typeof(string)))
        {
            return base.ConvertTo(context, culture, value, destinationType);
        }
        return Array.Empty<DataColumn>().GetType().Name;
    }
}