C#

string[] splitter = var2.Split(' ');
if (splitter != null && splitter.Length > 4)
{
  xxx = string.Format("{0} {1}", splitter[2], splitter[3]);
}

public void test() {
    string var1 = "5567 87865 4432 54535 6678 4435";
    string var2 = "667 332 32 555677 4465 44444444";
    string part_of_var1 = "4432 54535";
    string xxx=getPartsOfVar2(var1, var2, part_of_var1, ' ');
    Console.WriteLine(xxx);
|

public string getPartsOfVar2(string var1, string var2, string part_of_var1, char sep) {
    string[] arr1=var1.Split(sep);
    string[] arr2=var2.Split(sep);
    if (arr1.Length!=arr2.Length) throw some exception;
    string[] arr1p=part_of_var1.Split(sep);
    int partCount=arr1p.Length;
    string[] arr2p=new string[partCount];
    for(int i=0; i<partCount; i++) {
        string part=arr1p[i];
        int index=arr1.IndexOf(part);
        if (index<0) throw some exception;
        arr2p[i]=arr2[index];
    }
    return String.Join(sep, arr2p);
}

<code>    // Unordered set
    public class Set<T> : KeyedCollection<T, T>
    {
        public Set()
            : base( EqualityComparer<T>.Default, -1 )
        {
        }

        public Set( IEqualityComparer<T> comparer )
            : base( comparer, -1 )
        {
        }

        public new void Add( T item )
        {
            if ( !this.Contains(item ) )    // throws a non-documented exception otherwise.
                base.Add( item );
        }

        public void AddRange( IEnumerable<T> enumerable )
        {
            foreach ( T item in enumerable )
                this.Add( item );
        }

        override protected T GetKeyForItem( T item )
        {
            return item;
        }
    }
</code>

sharpiesharpie wrote:

The problem is that it overwrites the previous text in the file every time, is there a way to append the text?

docXML.Load(s_FileName);

sharpiesharpie wrote:

and is there a better way to save the information?

private void Serialize(object obj, Stream s)
{
  XmlSerializer serializer = new XmlSerializer(obj.GetType());
  serializer(s, obj);
}