IRepository vs. IRepository<T>

I'm trying to define one specific interface for all my repositories implement, than is just this:

public abstract class GeneralizedRepository
{
    readonly IDataModel _Model;

    public GeneralizedRepository(IDataModel Model) {
        if (Model == null)
            throw new NullReferenceException();
        _Model = Model;
    }

    public IDataModel DataModel { get { return _Model; } }

    public abstract IEnumerable<T> GetAll<T>();
    public abstract T GetOne<T>(Func<T, bool> predicate);

    public abstract bool Contains<T>(Func<T, bool> predicate);
    public abstract void Add<T>(T entity);
    public abstract void Update<T>(T entity);
    public abstract bool Remove<T>(Func<T, bool> predicate);
}

This is a class because my derived repositories have in common the instance DataModel

Now I have concrete implementations as:

public class DetailRep : GeneralizedRepository
{
    public DetailRep(IDataModel Model) : base(Model) { }
    public DetailRep(UnitOfWork Unit) : base(Unit.Model) { }

    public overr开发者_开发技巧ide IEnumerable<T> GetAll<T>() {
        throw new NotImplementedException();
    }

    public override T GetOne<T>(Func<T, bool> predicate) {
        throw new NotImplementedException();
    }

    public override bool Contains<T>(Func<T, bool> predicate) {
        throw new NotImplementedException();
    }

    public override void Add<T>(T entity) {
        throw new NotImplementedException();
    }

    public override void Update<T>(T entity) {
        throw new NotImplementedException();
    }

    public override bool Remove<T>(Func<T, bool> predicate) {
        throw new NotImplementedException();
    }
}

But it is a Detail Repository, what i mean is that i want replace all T's for the type Detail

But an error is thrown at compile time:

Type parameter declaration must be an identifier not a type

---

Declare your abstract class as a generic:

public abstract class GeneralizedRepository<T>
{
    readonly IDataModel _model;
    public GeneralizedRepository(IDataModel model)
    {
        if (model == null)
            throw new NullReferenceException();
        _model = model;
    }
    public IDataModel DataModel { get { return _model; } }
    public abstract IEnumerable<T> GetAll();
    public abstract T GetOne(Func<T, bool> predicate);
    public abstract bool Contains(Func<T, bool> predicate);
    public abstract void Add(T entity);
    public abstract void Update(T entity);
    public abstract bool Remove(Func<T, bool> predicate);
}

And than on your derived class fill in the Type with your Detail:

public class DetailRep  : GeneralizedRepository<Detail>
{
    public DetailRep(IDataModel model)
        : base(model)
    {
    }
    public override IEnumerable<Detail> GetAll(){}
    public override Detail GetOne(Func<Detail, bool> predicate){}
    public override bool Contains(Func<Detail, bool> predicate){}
    public override void Add(Detail entity){}
    public override void Update(Detail entity){}
    public override bool Remove(Func<Detail, bool> predicate){}
}