Context does not load Bank data

My context is not bringing the bank's data.

Error messages.

  

Value can not be null.

     

"Value can not be null. \ r \ n Parameter name: connection"

     

Value can not be null. Parameter name: connection

Connection string string Business Entity

<connectionStrings>
<add name="ASCSEntities" connectionString="" providerName="System.Data.EntityClient" />

Connection string string WPF

  <connectionStrings>
<add name="ASCSEntities" connectionString="" providerName="System.Data.EntityClient" />

Creating the Context:

 public partial class ASCSEntities : DbContext
{
    public ASCSEntities()
        : base("name=ASCSEntities")
    {
    }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        throw new UnintentionalCodeFirstException();
    }
}