DicomDataSet ds = new DicomDataSet("Dataset.dcm");    
                    
ds.ForEachAttribute(path =>
{
    int group = path.TargetAttribute.Group;
    int element = path.TargetAttribute.Element;
    string tagFormatted = $"({group:X4},{element:X4})";
    string keyword = path.TargetAttribute.Keyword;
    
    object value = path.TargetAttribute.Value;
    string displayValue;
    
    if (value == null)
    {
        displayValue = "(null)";
    }
    else if (value is string s)
    {
        displayValue = s;
    }
    else if (value is Array arr && !(value is byte[]))
    {
        var firstItems = arr.Cast<object>().Take(5).Select(v => v?.ToString()?.Trim() ?? "(null)");
        displayValue = string.Join(", ", firstItems);
        if (arr.Length > 5) displayValue += " ...";
    }
    else if (value is System.UInt16[,,])
    {
        displayValue = "(Pixel Data: UInt16[,,] - not displayed)";
    }
    else 
    {
        displayValue = value.ToString()?.Trim();
    }
      
    Console.WriteLine($"{tagFormatted} {keyword} = {displayValue}");
});
                    
// Output:
(0008,0008) ImageType = ORIGINAL, PRIMARY, AXIAL, VOLUME
(0008,0012) InstanceCreationDate = 14/01/1997 00:00:00
(0008,0013) InstanceCreationTime = 01/01/0001 03:50:56
.....