如何通过StartsWith查找列表中的第一个或最后一个字符串或包含搜索值而不添加到另一个列表中

Question

I'm trying to understand what variants I can use to get only one string with Contains or StartsWith first or last line, which contains searching value or starts with it. But without creating of new list and taking of first or last line from there, which result is actually answer to this question, but I wondering if it is possible to get it directly from the list, for example if list content is:

  List<string> list = new List<string>()
            {
                "data file collection k"
                "file name collection l",
                "file data collection m",
                "name data collection a",
                "name data collection b",
                "data name collection c",
                "data file collection d"
            };

and searching word:

string val = "name";

So this way:

foreach (string str in List) 
{ 
     if (str.StartsWith(val)) 
     { 
         // ...
     } 
}

result is:

name data collection a
name data collection b

or if look for whole string content for example:

  var mtchVal = list.Where(stringToCheck => stringToCheck.Contains(val)); 

result would be:

file name collection l
name data collection a
name data collection b
data name collection c

but desired result with StartsWith must be:

name data collection a

and by whole content:

file name collection l

Answer 1

If linq is allowed then

    var list = new List<string>();
    var first = list.FirstOrDefault(s => s.StartsWith("name"));
    var last = list.LastOrDefault(s => s.StartsWith("name"));

Answer 2

For the StartsWith case, use

list.FirstOrDefault(stringToCheck => stringToCheck.StartsWith(val)); 

For the whole string content case, use

list.FirstOrDefault(stringToCheck => stringToCheck.Contains(val));