DatasetTableAdapter

Question

I have one database as company

 

In that I have 4 table: Alpha,Beta,Gamma,like that

In this 1^st table with sql connection is working

 

Then I done same procedure for remaining tables but it show Error as

 

 

 Beta tableAdapter does not  exist namespace what is the meaning for this why it works for only 1^st table but does not work for remaining tables.

and also i am changing table name corresponding sqlconnection

 

 

{

CompanyDataSet dataSet = new CompanyDataSet();

  CompanyDataSetTableAdapters. AlphaTableAdapter adapter = new CompanyDataSetTableAdapters. AlphaTableAdapter();         showing error in these only line :DatasetTableAdapter does not exist

            adapter.Fill(dataSet. Alpha);    showing error in  these  only line

 

            comboBox1.DataSource = dataSet. Alpha;   showing error in  these  only line

            comboBox1.DisplayMember = "Printname";

 

}

 

{

 

CompanyDataSet dataSet = new CompanyDataSet();

            CompanyDataSetTableAdapters. BetaTableAdapter adapter = new CompanyDataSetTableAdapters. BetaTableAdapter();

            adapter.Fill(dataSet.Beta);

 

            comboBox1.DataSource = dataSet.Beta;

            comboBox1.DisplayMember = "Printname";

 

}