C# (Sharp) Programming Language

Make sure that the target type set in the project properties setting is set to Windows Application, and not Console Application. If you're using the command line, compile with /target:winexe & not target:exe.

It returns a read-only dataset from the data source when the command is executed.

It is available to derived classes and classes within the same Assembly (and naturally from the base class it is declared in).

In debug compilation, assert takes in a Boolean condition as a parameter, and shows the error dialog if the condition is false. The program proceeds without any interruption if the condition is true.

If you try to instantiate the class inside the try, it'll be out of scope when you try to access it from the catch block. A way to get around this is to do the following: Connection conn = null;

try

{

conn = new Connection();

conn.Open();

}

finally

{

if (conn != null) conn.Close();

}

By setting it to null before the try block, you avoid getting the CS0165 error (Use of possibly unassigned local variable 'conn').

Global attributes must appear after any top-level using clauses and before the first type or namespace declarations. An example of this is as follows:

using System;

[assembly : MyAttributeClass]

class X {}

Note that in an IDE-created project, by convention, these attributes are placed in

AssemblyInfo.cs.

Value. The data type of the value parameter is defined by whatever data type the property is declared as.

No. The signature of the virtual method must remain the same. (Note: Only the keyword virtual is changed to keyword override)

Yes, just place a colon, and then keyword base (parameter list to invoke the appropriate constructor) in the overloaded constructor definition inside the inherited class.

A delegate object encapsulates a reference to a method.

1. CorDBG – command-line debugger. To use CorDbg, you must compile the original C# file using the /debug switch.

2. DbgCLR – graphic debugger. Visual Studio .NET uses the DbgCLR.

Documentation looks the same. Use Debug class for debug builds, use Trace class for both debug and release builds.

Windows Authentication is trusted because the username and password are checked with the Active Directory, the SQL Server authentication is untrusted, since SQL Server is the only verifier participating in the transaction.

Deletes it from the memory.

an Assembly.

In the preceding example, the run-time type of Q is Double. CType succeeds because Double can be converted to Integer, but DirectCast fails because the run-time type of Q is not already Integer

what are value types and reference types?

Value type - bool, byte, chat, decimal, double, enum , float, int, long, sbyte, short, strut, uint, ulong, ushort

Value types are stored in the Stack

Reference type - class, delegate, interface, object, string

Reference types are stored in the Heap