public MapPointBuilderEx( 
   double x,
   double y,
   double z,
   SpatialReference spatialReference
)

// Use a builder convenience method or use a builder constructor.

// create a 3d point with M
MapPoint pt = MapPointBuilderEx.CreateMapPoint(1.0, 2.0, 3.0, 4.0);


// builderEx constructors don't need to run on the MCT.
MapPointBuilderEx mb = new MapPointBuilderEx(1.0, 2.0, 3.0, 4.0);
// do something with the builder

MapPoint ptWithM = mb.ToGeometry();


MapPoint clone = ptWithM.Clone() as MapPoint;
MapPoint anotherM = MapPointBuilderEx.CreateMapPoint(ptWithM);


MapPointBuilderEx builderEx = new MapPointBuilderEx(1.0, 2.0, 3.0);
builderEx.HasM = true;
builderEx.M = 4.0;

pt = builderEx.ToGeometry() as MapPoint;


// or another alternative with builderEx constructor
builderEx = new MapPointBuilderEx(1.0, 2.0, true, 3.0, true, 4.0, false, 0);
pt = builderEx.ToGeometry() as MapPoint;


// or use a builderEx convenience method
pt = MapPointBuilderEx.CreateMapPoint(1.0, 2.0, 3.0, 4.0);

// Use a builderEx convenience method or a builderEx constructor.
//  neither need to run on the MCT.

MapPoint point1 = null;
MapPoint point2 = null;

MapPointBuilderEx mb = new MapPointBuilderEx(1.0, 2.0, 3.0);
bool bhasZ = mb.HasZ;          // hasZ = true
bool bhasM = mb.HasM;          // hasM = false
bool bhasID = mb.HasID;        // hasID = false

// do something with the builder

point1 = mb.ToGeometry();

// change some of the builder properties
mb.X = 11;
mb.Y = 22;
mb.HasZ = false;
mb.HasM = true;
mb.M = 44;
// create another point
point2 = mb.ToGeometry();

double x = point1.X;                  // x = 1.0
double y = point1.Y;                  // y = 2.0
double z = point1.Z;                  // z = 3.0
double m = point1.M;                  // m = Nan
int ID = point1.ID;                   // ID = 0
bool hasZ = point1.HasZ;              // hasZ = true
bool hasM = point1.HasM;              // hasM = false
bool hasID = point1.HasID;            // hasID = false
bool isEmpty = point1.IsEmpty;        // isEmpty = false

bool isEqual = point1.IsEqual(point2);    // isEqual = false


// BuilderEx convenience methods 
MapPoint point3 = MapPointBuilderEx.CreateMapPoint(point1);
x = point3.X;                   // x = 1.0
y = point3.Y;                   // y = 2.0
z = point3.Z;                   // z = 3.0
m = point3.M;                   // m = Nan
ID = point3.ID;                 // ID = 0
hasZ = point3.HasZ;             // hasZ = true
hasM = point3.HasM;             // hasM = false
hasID = point3.HasID;           // hasID = false


MapPointBuilderEx builderEx = new MapPointBuilderEx(point1);
x = builderEx.X;              // x = 1.0
y = builderEx.Y;              // y = 2.0
z = builderEx.Z;              // z = 3.0
m = builderEx.M;              // m = Nan
ID = builderEx.ID;            // ID = 0
hasZ = builderEx.HasZ;        // hasZ = true
hasM = builderEx.HasM;        // hasM = false
hasID = builderEx.HasID;      // hasID = false
isEmpty = builderEx.IsEmpty;     // isEmpty = false

MapPoint point4 = builderEx.ToGeometry() as MapPoint;


MapPoint point5 = MapPointBuilderEx.CreateMapPoint(point1);
x = point5.X;              // x = 1.0
y = point5.Y;              // y = 2.0
z = point5.Z;              // z = 3.0
m = point5.M;              // m = Nan
ID = point5.ID;            // ID = 0
hasZ = point5.HasZ;        // hasZ = true
hasM = point5.HasM;        // hasM = false
hasID = point5.HasID;      // hasID = false
isEmpty = point5.IsEmpty;     // isEmpty = false