Yes, this is most definitely MS SQL Server. Based on the SQL_Latin1_General_CP1_CS_AS collation, the T-SQL being executed, the error message coming from System.Data.SqlClient, the screen shot of SQL Server Management Studio (SSMS), etc..
Yes, this is most definitely MS SQL Server. Based on the SQL_Latin1_General_CP1_CS_AS collation, the T-SQL being executed, the error message coming from System.Data.SqlClient, the screen shot of SQL Server Management Studio (SSMS), etc..