// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
namespace System.ComponentModel
{
    /// <summary>
    /// Suppose that you have some data that can be indexed by use of string:
    /// then there are two types of errors:
    /// 1. an error for each piece of data that can be indexed
    /// 2. an error that is valid on the entire data
    /// </summary>
    public interface IDataErrorInfo
    {
        string this[string columnName] { get; }
 
        string Error { get; }
    }
}