(Solved) How to extract numeric values from string?

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You could use regular expression to do this. Although this pattern is very naively implemented, it is a start. I’ve used Tuple instead of Vector, but you can easily change that yourself.

    static readonly Regex VectorRegex = new Regex(@"a:(?<A>[0-9]+\.[0-9]+);b:(?<B>[0-9]+\.[0-9]+);c:(?<C>[0-9]+\.[0-9]+)", RegexOptions.Compiled);

    static Tuple<double, double, double> ParseVector(string input)
    {
        var m = VectorRegex.Match(input);

        if (m.Success)
        {
            double a, b, c;
            a = double.Parse(m.Groups["A"].Value, System.Globalization.NumberFormatInfo.InvariantInfo);
            b = double.Parse(m.Groups["B"].Value, System.Globalization.NumberFormatInfo.InvariantInfo);
            c = double.Parse(m.Groups["C"].Value, System.Globalization.NumberFormatInfo.InvariantInfo);
            return new Tuple<double, double, double>(a, b, c);
        }
        else
            throw new FormatException("Invalid input format");
    }

solved How to extract numeric values from string?