C#

[AttributeUsage(AttributeTargets.Property, AllowMultiple =true)]
public class MaxLengthAttribute : Attribute
{

    public string Version;
    public int MaxLength;

    public MaxLengthAttribute(string version, int max)
    {
       Version= version;
       MaxLength = max;
    }
}

public CustomerRow : DataRow
{
   [MaxLength("1.0", 40)]
   [MaxLength("2.0", 45)]
   public string Name
   {
        get
        {
            if(base["Name"] == DBNull.Value) throw new NullException("Name is null.");
            return ((TruncatedString)base["Name"]).Value;
        }
   }
}

public class TruncatedString
{
    public bool AutoTruncate;
    private string _Value;
    public string Value
    {
        get
        {
            if(AutoTruncate)
            {
                int maxLength = ???
                // How to get the version from the DataSet
                // And the MaxLength attribute for the field in the data row
                if(maxLength >= 0 && Value.Length > maxLength) return _Value.Substring(0, maxLength);
            }
                return _Value;
         }
         set { _Value = value; }
    }
}

for (int i=0; i<arr.Length / 2; i++)
{
int temp = arr[i];
arr[i] = arr[arr.Length – i – 1];
arr[arr.Length – i – 1] = temp;
}