string data = "Data(1,10, 100) Values (5, 15,25)";
int res1, res2, res3, res4, res5, res6;
var result = Regex.Matches(data, @"\d+,\s*\d+,\s*\d+").Cast<Match>().SelectMany(x => Regex.Matches(x.Value, @"\d+").Cast<Match>()).Select(x => Convert.ToInt32(x.Value)).ToArray();
res1 = result[0];
res2 = result[1];
// <...>

var result = Regex.Matches(data, @"\s*\d+\s*").Cast<Match>().Select(x => Convert.ToInt32(x.Value)).ToArray();