ArcMapAddinVisibility.ViewModels.TabBaseViewModel.GetPointFromString C# (CSharp) Method

        internal IPoint GetPointFromString(string coordinate)
        {
            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);

            var point = new Point() as IPoint;
            point.SpatialReference = geographicCS;
            var cn = point as IConversionNotation;

            if (cn == null)
                return null;

            try { cn.PutCoordsFromDD(coordinate); return point; }
            catch { }
            try { cn.PutCoordsFromDDM(coordinate); return point; }
            catch { }
            try { cn.PutCoordsFromDMS(coordinate); return point; }
            catch { }
            try { cn.PutCoordsFromGARS(esriGARSModeEnum.esriGARSModeCENTER, coordinate); return point; }
            catch { }
            try { cn.PutCoordsFromGARS(esriGARSModeEnum.esriGARSModeLL, coordinate); return point; }
            catch { }
            try { cn.PutCoordsFromMGRS(coordinate, esriMGRSModeEnum.esriMGRSMode_Automatic); return point; }
            catch { }
            try { cn.PutCoordsFromMGRS(coordinate, esriMGRSModeEnum.esriMGRSMode_NewStyle); return point; }
            catch { }
            try { cn.PutCoordsFromMGRS(coordinate, esriMGRSModeEnum.esriMGRSMode_NewWith180InZone01); return point; }
            catch { }
            try { cn.PutCoordsFromMGRS(coordinate, esriMGRSModeEnum.esriMGRSMode_OldStyle); return point; }
            catch { }
            try { cn.PutCoordsFromMGRS(coordinate, esriMGRSModeEnum.esriMGRSMode_OldWith180InZone01); return point; }
            catch { }
            try { cn.PutCoordsFromMGRS(coordinate, esriMGRSModeEnum.esriMGRSMode_USNG); return point; }
            catch { }
            try { cn.PutCoordsFromUSNG(coordinate); return point; }
            catch { }
            try { cn.PutCoordsFromUTM(esriUTMConversionOptionsEnum.esriUTMAddSpaces, coordinate); return point; }
            catch { }
            try { cn.PutCoordsFromUTM(esriUTMConversionOptionsEnum.esriUTMUseNS, coordinate); return point; }
            catch { }
            try { cn.PutCoordsFromUTM(esriUTMConversionOptionsEnum.esriUTMAddSpaces | esriUTMConversionOptionsEnum.esriUTMUseNS, coordinate); return point; }
            catch { }
            try { cn.PutCoordsFromUTM(esriUTMConversionOptionsEnum.esriUTMNoOptions, coordinate); return point; }
            catch { }
            try { cn.PutCoordsFromGeoRef(coordinate); return point; }
            catch { }

            // lets see if we have a PCS coordinate
            // we'll assume the same units as the map units
            // get spatial reference of map
            if (ArcMap.Document == null || ArcMap.Document.FocusMap == null || ArcMap.Document.FocusMap.SpatialReference == null)
                return null;

            var map = ArcMap.Document.FocusMap;
            var pcs = map.SpatialReference as IProjectedCoordinateSystem;

            if (pcs == null)
                return null;

            point.SpatialReference = map.SpatialReference;
            // get pcs coordinate from input
            coordinate = coordinate.Trim();

            Regex regexMercator = new Regex(@"^(?<latitude>\-?\d+\.?\d*)[+,;:\s]*(?<longitude>\-?\d+\.?\d*)");

            var matchMercator = regexMercator.Match(coordinate);

            if (matchMercator.Success && matchMercator.Length == coordinate.Length)
            {
                try
                {
                    var Lat = Double.Parse(matchMercator.Groups["latitude"].Value);
                    var Lon = Double.Parse(matchMercator.Groups["longitude"].Value);
                    point.PutCoords(Lon, Lat);
                    return point;
                }
                catch
                {
                    return null;
                }
            }

            return null;
        }