private ISpatialReference GetSR()
{
Type t = Type.GetTypeFromProgID("esriGeometry.SpatialReferenceEnvironment");
System.Object obj = Activator.CreateInstance(t);
ISpatialReferenceFactory srFact = obj as ISpatialReferenceFactory;
// Use the enumeration to create an instance of the predefined object.
IGeographicCoordinateSystem geographicCS =
srFact.CreateGeographicCoordinateSystem((int)
esriSRGeoCSType.esriSRGeoCS_WGS1984);
return geographicCS as ISpatialReference;
}