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    <p>I used the answer to <a href="https://stackoverflow.com/questions/13327235/entity-framework-5-how-to-generate-poco-classes-from-existing-database">this question</a> to automatically generate the models from the existing 'webpage_' tables in my database. This ensures that the models are created in the exact same way that SimpleMembership creates them. This resulted in the following code:</p> <h2>Models:</h2> <pre><code>public partial class webpages_Membership { public int UserId { get; set; } public Nullable&lt;System.DateTime&gt; CreateDate { get; set; } public string ConfirmationToken { get; set; } public Nullable&lt;bool&gt; IsConfirmed { get; set; } public Nullable&lt;System.DateTime&gt; LastPasswordFailureDate { get; set; } public int PasswordFailuresSinceLastSuccess { get; set; } public string Password { get; set; } public Nullable&lt;System.DateTime&gt; PasswordChangedDate { get; set; } public string PasswordSalt { get; set; } public string PasswordVerificationToken { get; set; } public Nullable&lt;System.DateTime&gt; PasswordVerificationTokenExpirationDate { get; set; } } public partial class webpages_Roles { public webpages_Roles() { this.webpages_UsersInRoles = new HashSet&lt;webpages_UsersInRoles&gt;(); } public int RoleId { get; set; } public string RoleName { get; set; } public virtual ICollection&lt;webpages_UsersInRoles&gt; webpages_UsersInRoles { get; set; } } public partial class webpages_UsersInRoles { public int UserId { get; set; } public int RoleId { get; set; } public virtual webpages_Roles webpages_Roles { get; set; } } </code></pre> <h2>Fluent Mappings:</h2> <pre><code>internal partial class MembershipMapping : EntityTypeConfiguration&lt;webpages_Membership&gt; { public MembershipMapping() { this.HasKey(t =&gt; t.UserId); this.ToTable("webpages_Membership"); this.Property(t =&gt; t.UserId).HasColumnName("UserId").HasDatabaseGeneratedOption(new Nullable&lt;DatabaseGeneratedOption&gt;(DatabaseGeneratedOption.None)); this.Property(t =&gt; t.CreateDate).HasColumnName("CreateDate"); this.Property(t =&gt; t.ConfirmationToken).HasColumnName("ConfirmationToken").HasMaxLength(128); this.Property(t =&gt; t.IsConfirmed).HasColumnName("IsConfirmed"); this.Property(t =&gt; t.LastPasswordFailureDate).HasColumnName("LastPasswordFailureDate"); this.Property(t =&gt; t.PasswordFailuresSinceLastSuccess).HasColumnName("PasswordFailuresSinceLastSuccess"); this.Property(t =&gt; t.Password).HasColumnName("Password").IsRequired().HasMaxLength(128); this.Property(t =&gt; t.PasswordChangedDate).HasColumnName("PasswordChangedDate"); this.Property(t =&gt; t.PasswordSalt).HasColumnName("PasswordSalt").IsRequired().HasMaxLength(128); this.Property(t =&gt; t.PasswordVerificationToken).HasColumnName("PasswordVerificationToken").HasMaxLength(128); this.Property(t =&gt; t.PasswordVerificationTokenExpirationDate).HasColumnName("PasswordVerificationTokenExpirationDate"); } } internal partial class RolesMapping : EntityTypeConfiguration&lt;webpages_Roles&gt; { public RolesMapping() { this.HasKey(t =&gt; t.RoleId); this.ToTable("webpages_Roles"); this.Property(t =&gt; t.RoleId).HasColumnName("RoleId"); this.Property(t =&gt; t.RoleName).HasColumnName("RoleName").IsRequired().HasMaxLength(256); } } internal partial class UsersInRolesMapping : EntityTypeConfiguration&lt;webpages_UsersInRoles&gt; { public UsersInRolesMapping() { this.HasKey(t =&gt; new { t.UserId, t.RoleId }); this.ToTable("webpages_UsersInRoles"); this.Property(t =&gt; t.UserId).HasColumnName("UserId").HasDatabaseGeneratedOption(new Nullable&lt;DatabaseGeneratedOption&gt;(DatabaseGeneratedOption.None)); this.Property(t =&gt; t.RoleId).HasColumnName("RoleId").HasDatabaseGeneratedOption(new Nullable&lt;DatabaseGeneratedOption&gt;(DatabaseGeneratedOption.None)); this.HasRequired(t =&gt; t.webpages_Roles).WithMany(t =&gt; t.webpages_UsersInRoles).HasForeignKey(d =&gt; d.RoleId); } } </code></pre> <h2>Database Context:</h2> <pre><code>public class MembershipContext : DbContext, IDisposable { public DbSet&lt;webpages_Membership&gt; Membership { get; set; } public DbSet&lt;webpages_Roles&gt; Roles { get; set; } public DbSet&lt;webpages_UsersInRoles&gt; UsersInRoles { get; set; } protected override void OnModelCreating(DbModelBuilder modelBuilder) { modelBuilder.Configurations.Add(new MembershipMapping()); modelBuilder.Configurations.Add(new RolesMapping()); modelBuilder.Configurations.Add(new UsersInRolesMapping()); base.OnModelCreating(modelBuilder); } } </code></pre> <p>Note that I have excluded the OAuthMembership table, because I didn't need it for my solution. But if you follow the steps in the link I provided above you can easily include that table as well.</p>
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