Dynamically change table schema in entity framework not working

Dear Support Team,

I am running one asp.net project where i used entityframework 6 Database first approach.

I am using this context to just fetch the records from table.

Now i have some requirement here:

I have tableA which have default schema [dbo]. Now i have one more tableA having same structure with schema [MySchema] in same database.

This table i need to call passing some validation.

I used below code in Context class to get the specific table.

protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            if (!string.IsNullOrEmpty(_currentEnvironment) && _currentEnvironment.ToLower() == "anotherenv")
            {
                modelBuilder.Entity<MENU_FUNCTIONS>().ToTable("MENU_FUNCTIONS", "ProviderAdmin");
            }
            else
            {
                modelBuilder.Entity<MENU_FUNCTIONS>().ToTable("MENU_FUNCTIONS", "dbo");
            }
            base.OnModelCreating(modelBuilder);
        }
        public virtual DbSet<MENU_FUNCTIONS> MENU_FUNCTIONS { get; set; }

But OnModelCreating method is not executing at all, Due to it specific table is not getting called.

I did some googled and found like OnModelCreating method will call if use Code first approach.

But in my case these two tables are already present in database, But i need to call specific schema entity based on above condition.

How to achieve this?

Please suggest.