get text between two words in a string

Question

i have string like this:

string myOrder= " \"orderID\":\"123456\",\"orderName\":\"ABC\",\"orderDate\":\"20170120\""

I am trying to get values of orderID, orderName, orderDate by the following method:

List<string> orderName= ExtractFromString(myOrder, "\"orderName\":\"", "\",");

private static List<string> ExtractFromString(string text, string startString, string endString)

{

List<string> matched = new List<string>();

int indexStart = 0, indexEnd = 0;

bool exit = false;

while (!exit)

{

indexStart = text.IndexOf(startString);

indexEnd = text.IndexOf(endString);

if (indexStart != -1 && indexEnd != -1)

{

matched.Add(text.Substring(indexStart + startString.Length,

indexEnd - indexStart - startString.Length));

text = text.Substring(indexEnd + endString.Length);

}

else

exit = true;

}

return matched;

}

I am getting null exception at matched.add(...

Advance thanks,

Darma