// C# Extension Method

// Doc: https://csharp-extension.com/en/method/1002750/dbcommand-executescalarasordefault

​

// @nuget: Z.ExtensionMethods

​

using System;

using System.Data.SqlClient;

public class Program

{

    public static void Main()

    {

        const string sql = @"SELECT 'FizzBuzz' As StringColumn";

​

        using (var conn = new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()))

        {

            using (SqlCommand command = conn.CreateCommand())

            {

                conn.Open();

                command.CommandText = sql;

                //C# Extension Method: DbCommand - ExecuteScalarAsOrDefault

                Console.WriteLine(command.ExecuteScalarAsOrDefault<string>());

                Console.WriteLine(command.ExecuteScalarAsOrDefault<int>());

                Console.WriteLine(command.ExecuteScalarAsOrDefault(-1));

                Console.WriteLine(command.ExecuteScalarAsOrDefault(c => -2));

            }

        }

    }

}