Example of using Reflection to set DbSets passing in same DbContext to repositories. P.S. DI was not used in this project this had to resort to this.

ReflectionDbSet.cs

//Gets the DbSets and sets their properties to equivalent instances passing in same DbContext
this.GetType().GetProperties()
    .Where(p => p.PropertyType.GetGenericTypeDefinition() == typeof(GenericRepository<>))
    .ToList()
    .ForEach(dbset => 
    {
        Type EntityType = dbset.PropertyType.GenericTypeArguments[0];
        Type GenericRepoType = dbset.PropertyType.GetGenericTypeDefinition().MakeGenericType(EntityType);
        ConstructorInfo ctor = GenericRepoType.GetConstructor(new[] { typeof(ApplicationDbContext) });
        object GenericRepoInstance = ctor.Invoke(new object[] { DbContext });
        dbset.SetValue(this, GenericRepoInstance);
    });