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| ArcObjects Help for .NET developers > ArcObjects namespaces > Geometry > ESRI.ArcGIS.Geometry > Interfaces > IP > IProjectedCoordinateSystem Interface > IProjectedCoordinateSystem.LatitudeOf1st Property (ArcObjects .NET 10.5 SDK) | 
The latitude of the first point (Phi 1) of a projected coordinate system.
[Visual Basic .NET] Public Property LatitudeOf1st As Double
[C#] public double LatitudeOf1st {get; set;}
[C++]
HRESULT get_LatitudeOf1st(
  double* standardLongitude1
);
[C++]
HRESULT put_LatitudeOf1st(
  double standardLongitude1
);
[C++]
Parameters standardLongitude1 [out, retval] standardLongitude1 is a parameter of type double standardLongitude1 standardLongitude1 is a parameter of type double
    private void ManipulateLatitudeOf1st(IProjectedCoordinateSystem projectedCoordinateSystem)
    {
        double latitudeOf1st=projectedCoordinateSystem.LatitudeOf1st;
        System.Windows.Forms.MessageBox.Show(latitudeOf1st.ToString());
        projectedCoordinateSystem.LatitudeOf1st=0;
    }