How to decrease the length of an integer Array (with binary data [0,1]) without losing data???

I think what you want is to store several binary data into one int varable, is that right?
If so, the answer is definitely yes. You can follow this way:
BinaryDataArray   Int32
0,1                        1*2+0=2
1,0,1                     1*4+0*2+1=5
0,1,0,1,1                1*16+1*8+0*4+1*2+0=26
 
I wrote a function to Store as below:
Wish help :)
public static uint StoreBit(int[] bitArray)
{
// ensure bitArray is not null
if (bitArray == null)
{
throw new Exception("bitArray should not be null");
}
// ensure Length of bitArray is less than 32, otherwise we cannot store it in UInt32
if (bitArray.Length > 32)
{
throw new Exception();
}
//Store in one UInt varaible
UInt32 result = 0;
for (int i = 0; i < bitArray.Length; i++)
{
if (bitArray[i] == 1)
{
result += ((uint)bitArray[i]) << i;
}
else if (bitArray[i] == 0)
{
// do nothing
}
else
{
throw new Exception("we only accept bit");
}
}
return result;
}