///<summary>
/// Get Hash Code.
///</summary>
///<returns>Hash Code for the current instance.</returns>
public override int GetHashCode()
{
int hashCode = base.GetHashCode();
if (_source != null)
{
hashCode += _source.GetHashCode();
}
if (_target != null)
{
hashCode += _target.GetHashCode();
}
return(hashCode);
}