C# 将内容数量有限的字符串数组内容从最后一个数组位置传输到新的字符串数组

我有一个名为“String\u array\u packet”的字符串数组，其中包含

FA，6,52,4C，0，A4，FA，6,52,4C，0，A4，FA，6,52,4C，0，A4，FA，6,52,4C，0，A4，FA，6,52,4C，0，A4，FA，6,52,4C，0，0，A4，FA，6,52,4C，0

现在我需要检查从数组末尾（string_Array_packet）到另一个字符串数组的内容“FA，6,52,4C，0，A4”（这是正确的响应）是否存在。在上面的数组内容中，正确的响应从string_array_packet[Length-8]开始，考虑到FA是每个响应的开始字节。但是索引位置可能会有所不同，因为数组内容是动态生成的。我正在尝试以下方法，但我知道如果职位发生变化，它将不起作用。任何帮助都将不胜感激

    string_array_packet[string_array_packet.Length - 8]);

---

您可以执行以下操作

var strArray = new string[]{"FA","6","52","4C","0","A4","FA","6","52","4C","0","A4","FA","6","52","4C","0","A4","FA","6","52","4C","0","A4","FA","6","52","4C","0","A4","FA","6","52","4C","0","A4","FA","6","52","4C","0","A4","FA","6"};
var searchArray = new string[]{"FA","6","52","4C","0","A4"};
var index = strArray.FindAllIndexOf("FA")
                    .Reverse() 
                    .First(x=>strArray
                                .Skip(x)
                                .Take(searchArray.Count())
                                .SequenceEqual(searchArray));
var result = strArray.Skip(index).Take(searchArray.Count());

其中FindAllIndexOf定义为

public static class Extension
{
    public static int[] FindAllIndexOf<T>(this IEnumerable<T> values, T val)
    {
        return values.Select((b,i) => object.Equals(b, val) ? i : -1)
                     .Where(i => i != -1)
                     .ToArray();
    }
}

index : 36
result : FA,6,52,4C,0,A4