public static double DotProduct( 
   Vector3 vector1,
   Vector3 vector2
)

Parameters

vector1

vector2

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

Vector3 Class
Vector3 Members