Supports all .NET ADO providers.

DbContext context = new DbContext(new ConnectionProvider(new ConnectionStringProvider()));
string connectionStringKey = @"northwind";

string query = @"SELECT TOP 10 * FROM customers";
List<Customer> customers = context.Query<Customer>(connectionStringKey, query, null);

string parameterizedQuery = @"SELECT * FROM Customers WHERE CustomerID = @customerId";
string paramName = "customerId";
string customerId = @"ALFKI";
Tuple<string, object> t = new Tuple<string, object>(paramName, customerId);
customers = context.Query<Customer>(connectionStringKey, parameterizedQuery, new List<Tuple<string, object>>() { t });

Tuple<string, object, DbType, ParameterDirection> procedureParam = new Tuple<string, object, DbType, ParameterDirection>("OrderID", 10248, DbType.Int32, ParameterDirection.Input);
List<CustomerOrderDetail> details = context.Procedure<CustomerOrderDetail>(connectionStringKey, "dbo.CustOrdersDetail", new List<Tuple<string, object, DbType, ParameterDirection>>() { procedureParam });

string insertQuery = @"insert into region (RegionID, RegionDescription)values (@regionId, @description)";
var valueTupleList = new List<Tuple<string, object>>();
Tuple<string, object> t1 = new Tuple<string, object>("regionId", 5);
Tuple<string, object> t2 = new Tuple<string, object>("description", "MidWestern");

int result = context.ExecuteQuery(connectionStringKey, insertQuery, new List<Tuple<string, object>>() { t1, t2 });

string updateQuery = @"UPDATE region SET RegionDescription = @description WHERE RegionID = @regionId";
t2 = new Tuple<string, object>("description", "Mid-Western");
result = context.ExecuteQuery(connectionStringKey, updateQuery, new List<Tuple<string, object>>() { t1, t2 });

string deleteQuery = @"DELETE FROM region WHERE RegionID = @regionId";
result = context.ExecuteQuery(connectionStringKey, deleteQuery, new List<Tuple<string, object>>() { t1 });

* Cannot perform multiple inserts.