basic C# interface for a MongoDB repository

IRepository.cs

public interface IRepository<TEntity>
{
    string CollectionName { get; }

    Task<long> CountAsync(FilterDefinition<TEntity> filter);
    IFindFluent<TEntity, TEntity> Find(FilterDefinition<TEntity> filter);
    IFindFluent<TEntity, TEntity> Find(Expression<Func<TEntity, bool>> filter);
    Task<TEntity> FindOneAndReplaceAsync(FilterDefinition<TEntity> filter, TEntity replacement);
    Task<TEntity> FindOneAndReplaceAsync(Expression<Func<TEntity, bool>> filter, TEntity replacement);
}