Verify the text of a file matches a certain format

Question

I need to verify that the text of a file contains text in the following format:

#0
DIRECTION: FORWARD
SPEED: 10
TIME: 10

OR

#1
DIRECTION: REVERSE
SPEED: 10
ROTATIONS: 10

And this will repeat with multiple steps.

Where # must be followed by a number, DIRECTION must be followed by FORWARD or REVERSE, SPEED must be followed by a number and the last line will be either TIME or ROTATIONS followed by a number.

I want to verify that the file contains this text in this format and not some weird values before I start reading in the values.
Can I use some type of wild card? I have started looking at Regex, but I have not worked with it before.
What I would like to do is do some type of comparison where the number are wildcards, that way I know if the lines contain the basic formatting:

if(fileLines[0].Matches("#%")) // Where % would be the wildcard?  
if(fileLines[1].Matches("DIRECTION:%")) // Does something like this exist?

Answer 1

This patterns seems to work

    string[] lines = 
    {
        "#0",
        "DIRECTION: FORWARD",
        "SPEED: 10",
        "TIME: 10"
    };

      // meaning At start of line there is a # followed by digits till the end of line
    if(checkLine(@"^#\d+$", lines[0]) == false)
        Console.WriteLine("False on line 1");
    else
        Console.WriteLine("True on line 1");

      // meaning At start of line there is the word DIRECTION: followed by space and the words REVERSE or FORWARD
    if(checkLine(@"^DIRECTION: (REVERSE|FORWARD)", lines[1]) == false)
        Console.WriteLine("False on line 2");
    else
        Console.WriteLine("True on line 2");

      // meaning At start of line there is the word SPEED: followed by a space and digits till the end of the line
    if(checkLine(@"^SPEED: \d+$", lines[2]) == false)
        Console.WriteLine("False on line 3");
    else
        Console.WriteLine("True on line 3");

      // meaning At start of line there are the words TIME or ROTATIONS followed by colon, space and digits till the end of the line
    if(checkLine(@"^(TIME|ROTATIONS): \d+$", lines[3]) == false)
        Console.WriteLine("False on line 4");
    else
        Console.WriteLine("True on line 4");
}

// Define other methods and classes here
private bool checkLine(string regExp, string line)
{
    Regex r = new Regex(regExp);
    return r.IsMatch(line);
}