void Main(string argument)
{
    List<string> Arguments = ParseArgument(argument);
}

List<string> ParseArgument(string argument) {
    char QuoteType = ' ';
    bool InQuotes = false;
    var Output = new List<string>();
    bool MetaChar = false;
    StringBuilder CurrentWord = new StringBuilder();

    for (int i = 0; i < argument.Length; i++) {
        char CurrentChar = argument[i];
        if (CurrentChar == ' ') {
            if (!InQuotes && CurrentWord.Length > 0) {
                Output.Add(CurrentWord.ToString());
                CurrentWord = new StringBuilder();
            } else if (InQuotes) {
                CurrentWord.Append(CurrentChar);
            }
        } else if (CurrentChar == '"' || CurrentChar == '\'') {
            if (InQuotes) {
                if (MetaChar) {
                    CurrentWord.Append(CurrentChar);
                } else {
                    if (CurrentChar == QuoteType) {
                        InQuotes = false;
                        Output.Add(CurrentWord.ToString());
                        CurrentWord = new StringBuilder();
                    } else {
                        CurrentWord.Append(CurrentChar);
                    }
                }
            } else {
                InQuotes = true;
                QuoteType = CurrentChar;
            }
        } else if (CurrentChar == '\\') {
            if (MetaChar) {
                CurrentWord.Append(CurrentChar);
            } else {
                MetaChar = true;
                continue;
            }
        } else {
            CurrentWord.Append(CurrentChar);
        }
        MetaChar = false;
    }
    if (CurrentWord.Length > 0 && !InQuotes) {
        Output.Add(CurrentWord.ToString());
    }

    return Output;
}