How do you implement Façade Design Pattern in .NET?

Façade design pattern is used to group complicated classes into a simple interface.

In any application you develop, the core logic will include database connectivity and database manipulations done using ADO.NET. Hence ADO.NET will be the best component for which you can implement Façade Pattern in your .NET application.

Here is a simple example demonstrating how to group few of its complex tasks using Façade pattern:

public abstract class database {
protected OleDBConnection sampleConnection;
public void createConnection(string sampleConnString) {
sampleConnection = new OleDBConnection(sampleConnString);
public OleDBConnection getDBConnection() {
return sampleConnection;
public class sampleAccessDB:database {
public sampleAccessDB(string databaseName) {
string providerName = “Provider=Microsoft.Jet.OLEDB.3.0” ;
string sampleConnString = providerName + “;DataSource=” + databaseName;
public class sampleSQLServerDB:database {
public sampleSQLServerDB (string databaseName) {
string sampleConnString = “Persist Security Info = False; Initial Catalog = ”
+databaseName+”;Data Source= sampleDataServer; User ID = scott;

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