Question

The following code throws

The type initializer for ‘ConsoleApplication1.Program’ threw an exception.

on the line

public static Regexp[] keepers = { ... };

Why is this wrong and how can I fix it?

namespace ConsoleApplication1
{
    class Program
    {
        public static String output = "";
        public static Regex[] keepers = { 
                                            new Regex(@"using(?<everythingElse> [a-zA-Z.]+;)"),
                                            new Regex(@"namespace(?<everythingElse> [a-zA-Z._]+)"),
                                            new Regex(@"class(?<everythingElse> [a-zA-Z._]+)"),
                                            new Regex(@"(public|private)? ?(static)? ?(?<type> String|void|int|Double)(" + Regex.Escape("[") + "?" + Regex.Escape("]") + "?" + "(?<functionName> [a-z_]+)(?<params> [^\r\n]+)")
                                        };
        [STAThread]
        static void Main(string[] args)
        {}}}

Answer 1

In the 4. regex

@"(public|private)? ?(static)? ?(?<type> String|void|int|Double)(

opens a ( at the end. This is not being closed!