C# RegEx string extraction

Question

I have a string:

\"ImageDimension=655x0;ThumbnailDimension=0x0\".

I have to extract first number (\"655\" string) coming in be

Answer 1

Since a lot of people already gave you what you wanted, I will contribute with something else. Regexes are hard to read and error prone. Maybe a little less verbose than your implementation but more straightforward and friendly than using regex:

private static Dictionary _extractDictionary(string str)
{
    var query = from name_value in str.Split(';')   // Split by ;
                let arr = name_value.Split('=')     // ... then by =
                select new {Name = arr[0], Value = arr[1]};

    return query.ToDictionary(x => x.Name, y => y.Value);
}

public static void Main()
{
    var str = "ImageDimension=655x0;ThumbnailDimension=0x0";
    var dic = _extractDictionary(str);

    foreach (var key_value in dic)
    {
        var key = key_value.Key;
        var value = key_value.Value;
        Console.WriteLine("Value of {0} is {1}.", key, value.Substring(0, value.IndexOf("x")));
    }
}