C#

int threads = 200;
List<system.net.sockets.tcpclient> clientList = new List<system.net.sockets.tcpclient>(threads);
List<iasyncresult> resultList = new List<iasyncresult>();

for (int i = 0; i < threads; i++)
{
System.Net.Sockets.TcpClient client = new System.Net.Sockets.TcpClient();
IAsyncResult result = null;
try
{
	result = client.BeginConnect(testedHost, testedPort, null, null);
}
catch
{
}
clientList.Add(client);
resultList.Add(result);
}

for (int i = 0; i < threads; i++)
{
try
{
	clientList[i].EndConnect(resultList[i]);
	clientList[i].Close();
}
catch
{
	//processint the result and determining if tested host is alive or not
}

}
</iasyncresult></iasyncresult></system.net.sockets.tcpclient></system.net.sockets.tcpclient>

public static SqlDataAdapter CreateSqlDataAdapter(SqlConnection connection)
{
    SqlDataAdapter adapter = new SqlDataAdapter();
    adapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;

    // Create the commands.
    adapter.SelectCommand = new SqlCommand(
        "SELECT CustomerID, CompanyName FROM CUSTOMERS", connection);
    adapter.InsertCommand = new SqlCommand(
        "INSERT INTO Customers (CustomerID, CompanyName) " +
        "VALUES (@CustomerID, @CompanyName)", connection);
    adapter.UpdateCommand = new SqlCommand(
        "UPDATE Customers SET CustomerID = @CustomerID, CompanyName = @CompanyName " +
        "WHERE CustomerID = @oldCustomerID", connection);
    adapter.DeleteCommand = new SqlCommand(
        "DELETE FROM Customers WHERE CustomerID = @CustomerID", connection);

    // Create the parameters.
    adapter.InsertCommand.Parameters.Add("@CustomerID", 
        SqlDbType.Char, 5, "CustomerID");
    adapter.InsertCommand.Parameters.Add("@CompanyName", 
        SqlDbType.VarChar, 40, "CompanyName");

    adapter.UpdateCommand.Parameters.Add("@CustomerID", 
        SqlDbType.Char, 5, "CustomerID");
    adapter.UpdateCommand.Parameters.Add("@CompanyName", 
        SqlDbType.VarChar, 40, "CompanyName");
    adapter.UpdateCommand.Parameters.Add("@oldCustomerID", 
        SqlDbType.Char, 5, "CustomerID").SourceVersion = DataRowVersion.Original;

    adapter.DeleteCommand.Parameters.Add("@CustomerID", 
        SqlDbType.Char, 5, "CustomerID").SourceVersion = DataRowVersion.Original;

    return adapter;
}