ArcGIS Pro判断坐标系是否是1984

The easiest way is to check the well-known id.

if (sr.Wkid == SpatialReferences.WGS84.Wkid)

  IsWGS84 = true;

 

or you could use the hard-coded wkid = 4326. 

if (sr.Wkid == 4326) ... but occasionally these wkids are changed by EPSG so the first way is safer.