FileInfo.LastWriteTime Glitch on the network

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C#

DateTime

network

This Picture shows all necessary data to understand the Problem:
http://img21.imageshack.us/img21/2786/painintheass.png[^]

I have copy a File to another Client, using a networkdrive.
Than i have set the LastWriteTimeUtc to a defined value.
When i read the LastWriteTimeUtc of the written File (i used Refrech) there is always a glitch betwenn 1-2 Sek.
First i thought its connected with the local Time of each Client.
I tried to sync the local Time or set the local Time to a gread difference without any effect.
I also tried to find a cut in the binary precision but the digit which does not change lead to a precision of 40Sek. and not 1-2Sek. what says me its not connected to a precision.

I checked also the private Data of the FileInfo, and it is really not equal:
ftLastWriteTimeLow = 0xabdf4f00
ftLastWriteTimeLow = 0xaaf64ea1

I am at my wit's end.

Just if someone want to code a little bit (Traget&Source are getter which call .Refresh() on every Access):

....

Source.LastWriteTimeUtc = DateTime.UtcNow; 

Target.LastWriteTimeUtc = Source.LastWriteTimeUtc;
Target.CreationTimeUtc = Source.CreationTimeUtc;
var lLastWriteTimeUtc = ToBinary(Target.LastWriteTimeUtc.Ticks &  0xFFFFFFFF3000000);
var lLastWriteTimeUtc2 = ToBinary(Source.LastWriteTimeUtc.Ticks & 0xFFFFFFFF3000000);
var lLastWriteTimeUtc31 = ToBinary(Target.LastWriteTimeUtc.Ticks & 0xFFFFFFFF0000000);
var lLastWriteTimeUtc32 = ToBinary(Source.LastWriteTimeUtc.Ticks & 0xFFFFFFFF0000000);
var x = new DateTime(Source.LastWriteTimeUtc.Ticks & 0xFFFFFFFF0000000);
var y = new DateTime(Target.LastWriteTimeUtc.Ticks & 0xFFFFFFFF0000000);

....

//This is just the First hit when i looked for a ToBinary Converter, there is no need for improvement, i dont use it in regular code ;)
public static string ToBinary(Int64 Decimal)
{
    // Declare a few variables we're going to need
    Int64 BinaryHolder;
    char[] BinaryArray;
    string BinaryResult = "";

    while (Decimal > 0)
    {
        BinaryHolder = Decimal % 2;
        BinaryResult += BinaryHolder;
        Decimal = Decimal / 2;
    }

    // The algoritm gives us the binary number in reverse order (mirrored)
    // We store it in an array so that we can reverse it back to normal
    BinaryArray = BinaryResult.ToCharArray();
    Array.Reverse(BinaryArray);
    BinaryResult = new string(BinaryArray);

    return BinaryResult;
}