[C#/COMMON/.NET6] List<T> 클래스 : 리스트 임의로 섞기

using System;
using System.Collections.Generic;

#region 섞기 - Shuffle<TItem>(sourceList)

/// <summary>
/// 섞기
/// </summary>
/// <typeparam name="TItem">항목 타입</typeparam>
/// <param name="sourceList">소스 리스트</param>
/// <returns>섞은 후 리스트</returns>
public List<TItem> Shuffle<TItem>(List<TItem> sourceList)
{
    List<TItem> targetList = new List<TItem>();

    Random random = new Random(DateTime.Now.Millisecond);

    while(sourceList.Count > 0)
    {
        int index = random.Next(0, sourceList.Count);

        targetList.Add(sourceList[index]);

        sourceList.RemoveAt(index);
    }

    return targetList;
}

#endregion