How can I connect visual studio 2013 windows form C# application to SQL server 2008 r2 database?

Hi,
After studying the articles in the post i practiced using the following codes and also created a database sample as well as a table called tbl_records but i encountered an error " A first chance exception of type 'System.Data.SqlClient.SqlException' occurred in System.Data.dll

Additional information: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)" during compilation . Can somebody help me please?

using System;
using System.Data;
using System.Windows.Forms;
using System.Data.SqlClient;

namespace InsertUpdateDeleteDemo
{
public partial class frmMain : Form
{
SqlConnection con = new SqlConnection("Data Source=akintomide-pc;Initial Catalog=Sample;Integrated Security=true;");
SqlCommand cmd;
SqlDataAdapter adapt;
//ID variable used in Updating and Deleting Record
int ID = 0;
public frmMain()
{
InitializeComponent();
DisplayData();
}

private void btn_Delete_Click(object sender, EventArgs e)
{
if (ID != 0)
{
cmd = new SqlCommand("delete tbl_Records where ID=@id", con);
con.Open();
cmd.Parameters.AddWithValue("@id", ID);
cmd.ExecuteNonQuery();
con.Close();
MessageBox.Show("Record Deleted Successfully!");
DisplayData();
ClearData();
}
else
{
MessageBox.Show("Please Select Record to Delete");
}
}

private void btn_Insert_Click_1(object sender, EventArgs e)
{
if (txt_Name.Text != "" && txt_State.Text != "")
{
cmd = new SqlCommand("insert into tbl_Records(Name,State) values(@name,@state)", con);
con.Open();
cmd.Parameters.AddWithValue("@name", txt_Name.Text);
cmd.Parameters.AddWithValue("@state", txt_State.Text);
cmd.ExecuteNonQuery();
con.Close();
MessageBox.Show("Record Inserted Successfully");
DisplayData();
ClearData();
}
else
{
MessageBox.Show("Please Provide Details!");
}
}
//Display Data in DataGridView
private void DisplayData()
{
con.Open();
DataTable dt = new DataTable();
adapt = new SqlDataAdapter("select * from tbl_Records", con);
adapt.Fill(dt);
dataGridView1.DataSource = dt;
con.Close();
}
//Clear Data
private void ClearData()
{
txt_Name.Text = "";
txt_State.Text = "";
ID = 0;
}

//Update Record
private void btn_Update_Click_1(object sender, EventArgs e)
{
if (txt_Name.Text != "" && txt_State.Text != "")
{
cmd = new SqlCommand("update tbl_Records set Name=@name,State=@state where ID=@id", con);
con.Open();
cmd.Parameters.AddWithValue("@id", ID);
cmd.Parameters.AddWithValue("@name", txt_Name.Text);
cmd.Parameters.AddWithValue("@state", txt_State.Text);
cmd.ExecuteNonQuery();
MessageBox.Show("Record Updated Successfully");
con.Close();
DisplayData();
ClearData();
}
else
{
MessageBox.Show("Please Select Record to Update");
}
}

private void dataGridView1_CellContentClick(obj