public InstituicaoMap()
{
    // Primary Key
    HasKey(t => t.IdInstituicao);

    // Properties
    Property(t => t.Nome)
    .IsRequired()
    .HasMaxLength(255);
}

public CampanhaMap()
{
    // Primary Key
    this.HasKey(t => t.IdCampanha);

    // Properties
    this.Property(t => t.Texto)
        .IsRequired()
        .HasMaxLength(160);

    this.Property(t => t.DataEdicao)
        .IsFixedLength()
        .HasMaxLength(8)
        .IsRowVersion();

    // Relationships
    this.HasRequired(t => t.Instituicao)
        .WithMany(t => t.Campanhas)
        .HasForeignKey(d => d.IdInstituicao);
}

return new ContentResult
{
    Content = JsonConvert.SerializeObject(v),
    ContentType = "application/json"
};

[JsonIgnore]
public virtual Instituicao Instituicao{get;set;}

public CampanhaMap()
{
    // Primary Key
    this.HasKey(t => t.IdCampanha);

    // Properties
    this.Property(t => t.Texto)
        .IsRequired()
        .HasMaxLength(160);

    this.Property(t => t.DataEdicao)
        .IsFixedLength()
        .HasMaxLength(8)
        .IsRowVersion();

    // Relationships
    this.HasRequired(t => t.Instituicao)
        .WithMany(t => t.Campanhas)
        .HasForeignKey(d => d.IdInstituicao);

    this.Ignore(t => t.Instituicao);

}

public YouContext(): base("name=SchoolDBEntities")
    {
        this.Configuration.LazyLoadingEnabled = false;
    }