/// <summary>
/// Sets the dash pattern to be used by stroke().
/// A dash pattern is specified by dashes, an array of positive values.
/// Each value provides the user-space length of altenate "on" and "off" portions of the stroke.
/// The offset specifies an offset into the pattern at which the stroke begins.
/// If dashes is empty dashing is disabled. If the size of dashes is 1,
/// a symmetric pattern is assumed with alternating on and off portions of the size specified by the single value in dashes.
/// It is invalid for any value in dashes to be negative, or for all values to be 0.
/// If this is the case, an exception will be thrown
/// </summary>
/// <param name='offset'>
/// Offset.
/// </param>
/// <param name='pattern'>
/// Pattern.
/// </param>
public void SetLineDash(double offset, params double[] pattern)
{
handler.SetLineDash(Backend, offset, pattern);
}