RootedPathValidator.cs

using System.Configuration;
using System.IO;

namespace System.Xml.Serialization.Configuration
{
    public class RootedPathValidator : ConfigurationValidatorBase
    {
        public override bool CanValidate(Type type)
        {
            return type == typeof(string);
        }

        public override void Validate(object value)
        {
            string text = value as string;
            if (string.IsNullOrEmpty(text))
            {
                return;
            }
            text = text.Trim();
            if (!string.IsNullOrEmpty(text))
            {
                if (!Path.IsPathRooted(text))
                {
                    throw new ConfigurationErrorsException();
                }
                char c = text[0];
                if (c == Path.DirectorySeparatorChar || c == Path.AltDirectorySeparatorChar)
                {
                    throw new ConfigurationErrorsException();
                }
            }
        }
    }
}