获取字符串C#中单词之前的文本片段

string inputString = "This is a sample string";
string targetWord = "sample";

string[] words = inputString.Split(' ');

int targetIndex = Array.IndexOf(words, targetWord);

if (targetIndex >= 0)
{
    string textBeforeWord = string.Join(" ", words.Take(targetIndex));
    Console.WriteLine("文本片段： " + textBeforeWord);
}
else
{
    Console.WriteLine("未找到目标单词");
}