using Microsoft.EntityFrameworkCore; namespace SqlServerEFSample { public class EFSampleContext : DbContext { string _connectionString; public EFSampleContext(string connectionString) { this._connectionString = connectionString; } protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) { optionsBuilder.UseSqlServer(this._connectionString); } public DbSet Users { get; set; } public DbSet Tasks { get; set; } } }