connection oriented in windows forms

Question

hai friends,

I am a learner...

I am comparing connection oriented in both win-forms & web-forms.

Here is my code...

Web-Forms

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SqlConnection con = new SqlConnection("server=.;database=test;trusted_connection=true");

con.Open();

SqlCommand cmd = new SqlCommand("select * from employee",con);

SqlDataReader dr = cmd.ExecuteReader();

dataGridView1.DataSource = dr;

con.Close();

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I got the output.

Win-Forms

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SqlConnection con = new SqlConnection("server=.;database=test;trusted_connection=true");

con.Open();

SqlCommand cmd = new SqlCommand("select * from employee",con);

SqlDataReader dr = cmd.ExecuteReader();

dataGridView1.DataSource = dr;

con.Close();

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I dint get the output. 

Why?

Please answer this.....................