Below is a simple example for importing data from CSV file in D365 FO using X++: /// <summary> /// import color code /// </summary> class CFSImportColorCode {     /// <summary>     /// main     /// </summary>     /// <param name = “_args”>_args</param>     public static void main(Args _args)     {         AsciiStreamIo                       file;         Array                               fileLines;         FileUploadTemporaryStorageResult    fileUpload;         CFSEcoResColorCode                  colorCode;         CFSImportColorCode                  importColorCode = new CFSImportColorCode();         Counter                             counter = 0;         EcoResColorName                     color;         #OCCRetryCount         try         {             //Upload a file             fileUpload  = File::GetFileFromUser() as FileUploadTemporaryStorageResult;             file        = AsciiStreamIo::constructForRead(fileUpload.openResult());             if (file)             {                 if (file.status())                 {                     throw error(“@SYS52680”);                 }                 file.inFieldDelimiter(‘;’); //separator                 file.inRecordDelimiter(‘\r\n’);             }             //Read a CSV File             container rec;             ttsbegin;             while (!file.status())             {                 counter++;                 rec = file.read();                 if (conLen(rec))                 {                     color = conPeek(rec, 2);                     colorCode = CFSEcoResColorCode::find(color);                     if(!colorCode.RecId)                     {                         colorCode.clear();                         colorCode.Name  = color;                         colorCode.Code  = conPeek(rec, 1);                         colorCode.insert();                     }                 }             }             ttscommit;             info(“Operation complete.”);         }         catch (Exception::Deadlock)         {             retry;         }         catch (Exception::UpdateConflict)         {             if (appl.ttsLevel() == 0)             {                 if (xSession::currentRetryCount() >= #RetryNum)                 {                     throw Exception::UpdateConflictNotRecovered;                 }                 else                 {                     retry;                 }             }             else             {                 throw Exception::UpdateConflict;             }         }     } }