using System.Data.OleDb;
private void btnconect_Click(object sender, EventArgs e)
{
     OleDbConnection con = new OleDbConnection();
     con.ConnectionString = "provider=Microsoft.ace.oledb.12.0;Data source=نام جدول.accdb";
     con.Open();
}

private void btnshow_Click(object sender, EventArgs e)
{
OleDbConnection con = new OleDbConnection();
con.ConnectionString = "provider=Microsoft.ace.oledb.12.0;Data source=نام جدول.accdb";
con.Open();
OleDbCommand com = new OleDbCommand();
com.CommandText = "insert into person(نام ستون1,نام ستون...)value('مقدار ستون 1','مقدار ستون...')";
com.Connection = con;
com.ExecuteNonQuery();

private void btnshow_Click(object sender, EventArgs e)
{
OleDbConnection con = new OleDbConnection();
con.ConnectionString = "provider=Microsoft.ace.oledb.12.0;Data source=نام جدول.accdb";
con.Open();
OleDbCommand com = new OleDbCommand();
com.CommandText = "insert into person(نام ستون1,نام ستون...)value('"+نام کادر متن+"','"+نام کادرمتن...+"')";
com.Connection = con;
com.ExecuteNonQuery();

   
  com.Connection = con;
            com.ExecuteNonQuery();
            con.Close();