Concatenates Regex.Matches to a string

Question

This is my first question on Stack I have a string like this

string str = "key1=1;main.key=go1;main.test=go2;key2=2;x=y;main.go23=go23;main.go24=test24";

the matches pattern applied to extract all strings that starts with main. returns the

Regex regex = new Regex("main.[^=]+=[^=;]+");       
MatchCollection matchCollection = regex.Matches(str);

I have tried this to concatenates the match collection

string flatchain = string.Empty;
foreach (Match m in matchCollection)
{
    flatchain = flatchain +";"+ m.Value; 
}

Is there any better way to do it using LINQ ?

Answer 1

You can try to convert your result into an array and apply the string.Join to put your string in flat here you must specify the Match type explicitly as the MatchCollection is a non-generic IEnumerable type

  var toarray = from Match match in matchCollection select match.Value;
                string newflatChain = string.Join(";", toarray); 

or if you want just one line you can do it like the following

string newflatChain = string.Join(";", from Match match in matchCollection select match.Value);