C#动态操作SQL的方法!

刚写到一个程序,需要对SQL里面添加数据库和表.在网上找的资料不太全.特整理了一下.详细资料如下:
//__________________创建数据库____________________
string ConnectionString = "Data Source=localhost;Integrated Security=True;Pooling=False";
SqlConnection conn = new SqlConnection(ConnectionString);
conn.Open();
sql = "CREATE DATABASE clsky on primary(name = abc ,filename = 'e:\\clsky.mdf')";
SqlCommand cmd = new SqlCommand(sql, conn);
cmd.ExecuteNonQuery();
MessageBox.Show("创建数据库成功!");
//_________________________________________________

//________________创建表___________________________

string ConnectionString1 = "Data Source=localhost;Initial Catalog=clsky;Integrated Security=True;Pooling=False";
SqlConnection conn1 = new SqlConnection(ConnectionString1);
conn1.Open();
sql = "CREATE TABLE clsky"+
"(Id INTEGER CONSTRAINT PKeyMyId PRIMARY KEY,"+
"Name CHAR(50), Address CHAR(255), Balance FLOAT)";
SqlCommand cmd1 = new SqlCommand(sql, conn1);
cmd1.ExecuteNonQuery();
MessageBox.Show("创建数据库成功!");
//__________________________________________________

//_______________删除表_____________

sql = "DROP TABLE clsky";
SqlCommand cmd2 = new SqlCommand(sql, conn1);
cmd2.ExecuteNonQuery();
MessageBox.Show("删除表成功!");
conn1.Close();
conn.Close();
//_________________________________
你如果还要删除此数据库.可以使用:
string ConnectionString = "Data Source=localhost;Integrated Security=True;Pooling=False";
SqlConnection conn = new SqlConnection(ConnectionString);
conn.Open();
string sql = "DROP DATABASE clsky ";
SqlCommand cmd = new SqlCommand(sql, conn);
cmd.ExecuteNonQuery();