TableSchema does not get Foreign Keys

I am having a problem with getting the Foreign Keys from TableSchema object. I am programmactically creating list of objects that contains DatabaseSchema property and two TableSchemaCollection properties. This list is populated in primary template and then passed to sub-templates to create my code. The tables in the two collections seem to have all of the other information except the ForeignKeys and I am not sure why. I figure I am I must be doing something wrong in the instantiation of the TableSchema object. 

 Here is my custom object code:

 public class DatabaseInfo
{
 #region Private Fields
 
 private string _connectionStringName;
 private DatabaseSchema _schema = new DatabaseSchema();
 private TableSchemaCollection _entityTables = new TableSchemaCollection();
 private TableSchemaCollection _lazyLoadedEntityTables = new TableSchemaCollection();
 
 #endregion
 
 #region Public Properties
 
 public string ConnectionStringName
 {
  get { return _connectionStringName; }
 }
 public DatabaseSchema Schema
 {
  get { return _schema; }
 }
 public TableSchemaCollection EntityTables
 {
  get { return _entityTables; }
 }
 public TableSchemaCollection LazyLoadedEntityTables
 {
  get { return _lazyLoadedEntityTables; }
 }
 
 #endregion
 
 #region Constructor
 
 public DatabaseInfo(string connectionStringName, string connectionString, string providerName)
 {
  IDbSchemaProvider provider;
  switch(providerName)
  {
   case "SqlSchemaProvider":
    provider = new SqlSchemaProvider();
    break;
   case "ADOXSchemaProvider":
    provider = new ADOXSchemaProvider();
    break;
   default:
    throw new Exception("Provider not found.");
  }
  this._connectionStringName = connectionStringName;
  this._schema.ConnectionString = connectionString;
  this._schema.Provider = provider;
 }
 public DatabaseInfo(string connectionStringName, string connectionString, IDbSchemaProvider provider)
 {
  this._connectionStringName = connectionStringName;
  this._schema.ConnectionString = connectionString;
  this._schema.Provider = provider;
 }
 
 #endregion
}

 Here is the code where I populate the list of DatabaseInfo objects:

this.DatabaseList = new List<DatabaseInfo>();
 DatabaseInfo info;
 foreach(_CodeSmith.DataSourceDatabase database in DataSource.Databases)
 {
  info = new DatabaseInfo(database.ConnectionStringName, database.ConnectionString, database.ProviderType);
  
  foreach(_CodeSmith.DataSourceDatabaseSourceTable sourceTable in database.SourceTables)
  {
   info.EntityTables.Add(new TableSchema(info.Schema, sourceTable.Name, sourceTable.Owner, DateTime.Now));
  }
  
  foreach(_CodeSmith.DataSourceDatabaseLazyLoadedEntityTable lazyLoadTable in database.LazyLoadedEntityTables)
  {
   info.LazyLoadedEntityTables.Add(new TableSchema(info.Schema, lazyLoadTable.Name, lazyLoadTable.Owner, DateTime.Now));
  }
  
  this.DatabaseList.Add(info);
 }

 Thanks in advance for any advice.

Aaric