C# Check every other character is a '0'

I'm reading in a text file using BinaryReader, then doing what I want with it (stripping characters, etc..), then writing it out using BinaryWriter.

Nice and simple.

One of the things I need to do before I strip anything is to:

1. Check that the amount of characters in the file is even (obviously file.Length % 2) and

2. If the length is even, check that every preceding character is a zero.

For example:

0, 10, 0, 20, 0, 30, 0, 40.

I need to verify that every second character is a zero.

Any ideas? Some sort of clever for loop?

OKAY!

I need to be a lot more clear about what I'm doing. I have file.txt that contains 'records'. Let's just say it's a comma delimited file. Now, What my program needs to do is read through this file, byte by开发者_如何学C byte, and strip all of the characters we don't want. I have done that. But, some of the files that will be going through this program will be single byte, and some will be double byte. I need to deal with both of these possibilities. But, I need to figure out whether the file is single or double byte in the first place.

Now, obviously if the file is double byte:

1. The file length will be divisible by 2 and
2. Every preceding character will be a zero.

and THAT'S why I need to do this.

I hope this clears some stuff up..

UPDATE!

I'm just going to have a boolean in the arguments - is16Bit. Thanks for your help guys! I would have rather deleted the question but it won't let me..

---

Something like this in a static class:

public static IEnumerable<T> EveryOther(this IEnumerable<T> list)
{
   bool send = true;
   foreach(var item in list)
   {
      if (send) yield return item;
      send = !send;
   }
}

and then (using the namespace of the previous class)

bool everyOtherIsZero = theBytes.EveryOther().All(c => c == 0);

---

string[] foo = file.text.Split(new{','}, StringSplitOptions.RemoveEmptyEntries);
for(int i=0; i<foo .Length; i+=2)
{
  if(file[i]!="0")
     return false;
}

---

How about this

string content = File.ReadAllText(@"c:\test.txt");
if (content.Length % 2 != 0)
    throw new Exception("not even");
for(int i = 0; i < content.Length; i+=2)
    if (content[i] != '0')
        throw new Exception("no zero found");