How to backup local DB in visual studio 2013 windows forms C#

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C#

SQL

Windows

Visual-Studio

forms

I am trying to take backup of my Local DB in visual studio 2013

i was added some records in my Local DB using with Linq quary

but when i give connection string to Local DB then i got error 'Database not exist'

What I have tried:

private void btbakup_Click(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection();
SqlCommand sqlcmd = new SqlCommand();

con.ConnectionString = @"Data Source=(LocalDB)\v11.0;AttachDbFilename=|DataDirectory|\Database1.mdf;Integrated Security=True;";

string backups = "G:\\Backup";
if (!System.IO.Directory.Exists(backups))
{
System.IO.Directory.CreateDirectory(backups);
}

con.Open();

sqlcmd = new SqlCommand("backup database Database1 to disk='" + backups + "\\" + DateTime.Now.ToString("ddMMyyyy_HHmmss") + ".Bak'", con);

sqlcmd.ExecuteNonQuery();
con.Close();

MessageBox.Show("Data Backup Done", "Backup");


}