C#字符串数组包含来自另一个字符串数组的字符串部分

using System;

class Program
{
    static void Main()
    {
        string[] sourceStrings = { "apple", "banana", "orange", "grape" };
        string[] targetStrings = { "app", "ran", "gr" };

        string[] resultStrings = GetPartialStrings(sourceStrings, targetStrings);

        Console.WriteLine("包含目标字符串部分的源字符串有：");
        foreach (string str in resultStrings)
        {
            Console.WriteLine(str);
        }
    }

    static string[] GetPartialStrings(string[] sourceStrings, string[] targetStrings)
    {
        string[] resultStrings = new string[sourceStrings.Length];
        int count = 0;

        foreach (string sourceStr in sourceStrings)
        {
            foreach (string targetStr in targetStrings)
            {
                if (sourceStr.Contains(targetStr))
                {
                    resultStrings[count] = sourceStr;
                    count++;
                    break;
                }
            }
        }

        Array.Resize(ref resultStrings, count);
        return resultStrings;
    }
}