使用C中的regex提取某些子字符串#

我有一个词有一段话要说 1.2.2 和A some text 然后 some other texts . 我想去拿那部分。我创建了一个regex来匹配部分和一些文本。

以下是我的代码:

var word = "1.2.3 area consent testing, sklfjsdlkf jdifgjds visjeflk area consent testing lsdajfgo idsjgosa jfikdjfl343 fjdsl45jl sfgjsoiaetj l area consent testing";
var lowerWord = "area consent testing".ToLower();
var textLower = @word.ToLower().ToString();
Dictionary<int, string> matchRegex = new Dictionary<int, string>();
matchRegex.Add(1, @"(^\d.+(?:\.\d+)*[ \t](" + lowerWord + "))"); 


foreach (var check in matchRegex)
{
    string AllowedChars = check.Value;
    Regex regex = new Regex(AllowedChars);
    var match = regex.Match(textLower);
    if (match.Success)
    {
        var sectionVal = match.Value;
    }
}

现在我的问题是,我只想要价值 1.2.3 area consent testing 在我的 sectionVal 变量,但它给了我整条线。 即

sectionVal = "1.2.3 area consent testing, sklfjsdlkf jdifgjds visjeflk area consent testing lsdajfgo idsjgosa jfikdjfl343 fjdsl45jl sfgjsoiaetj l area consent testing";