public static bool IsFrame( int id, int[] list )
{
if ( id > list[list.Length - 1] )
return false;
for ( int i = 0; i < list.Length; ++i )
{
int delta = id - list[i];
if ( delta < 0 )
return false;
else if ( delta == 0 )
return true;
}
return false;
}