Simple DocX Editor in Native C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace DocXEditor
{
    /// <summary>
    /// Represents an instance of piece of text to be replaced
    /// </summary>
    public class ReplaceItem
    {
        public ReplaceItem(string oldString, string newString)
        {
            this.OldString = oldString;
            this.NewString = newString;
        }
        public string OldString { get; set; }
        public string NewString { get; set; }
    }

    /// <summary>
    /// Represents a list of items to be replaced
    /// </summary>
    public class ReplacementList : List<ReplaceItem>
    {
    }
}