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Is it possible to restrict the scope of a field/method of a class to the classes in the same namespace?
There is no way to restrict to a namespace. Namespaces are never units of protection. But if you're using assemblies, you can use the 'internal' access modifier to restrict access to only within the assembly.
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If I return out of a try/finally in C#, does the code in the finally-clause run?
Yes. The code in the finally always runs. If you return out of the try block, or even if you do a "goto" out of the try, the finally block always runs, as shown in the following example: using System;class main {public static void Main() {try {Console.WriteLine("In Try block");return;}finally {Console.WriteLine("In Finally block");}}}Both "In Try block" and "In Finally block" will be displayed. Whether...
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Does C# support try-catch-finally blocks?
Yes. Try-catch-finally blocks are supported by the C# compiler. Here's an example of a try-catch-finally block: using System;public class TryTest{static void Main(){try{Console.WriteLine("In Try block");throw new ArgumentException();}catch(ArgumentException n1){Console.WriteLine("Catch Block");}finally{Console.WriteLine("Finally Block");}}}Output: In Try BlockCatch BlockFinally Block
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Is it possible to have a static indexer in C#?
No. Static indexers are not allowed in C#.
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Does C# support #define for defining global constants?
No. If you want to get something that works like the following C code:#define A 1use the following C# code: class MyConstants{public const int A = 1;}Then you use MyConstants.A where you would otherwise use the A macro. Using MyConstants.A has the same generated code as using the literal 1.
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How do you mark a method obsolete?
Assuming you've done a "using System;": [Obsolete]public int Foo() {...}or [Obsolete("This is a message describing why this method is obsolete")]public int Foo() {...}Note: The O in Obsolete is capitalized.
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Is there an equivalent of exit() for quitting a C# .NET application?
Yes, you can use System.Environment.Exit(int exitCode) to exit the application or Application.Exit() if it's a Windows Forms app.
sahu
- Jan 6th, 2006
Ans:YesSystem.Environment.Exit(int exitCode) to exit the application or Application.Exit() if it's a Windows Forms app.
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Can I define a type that is an alias of another type (like typedef in C++)?
Not exactly. You can create an alias within a single file with the "using" directive: using System;using Integer = System.Int32; // aliasBut you can't create a true alias, one that extends beyond the file in which it is declared. Refer to the C# spec for more info on the 'using' statement's scope.
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How do you directly call a native function exported from a DLL?
Here's a quick example of the DllImport attribute in action: using System.Runtime.InteropServices;class C{[DllImport("user32.dll")]public static extern int MessageBoxA(int h, string m, string c, int type);public static int Main() {return MessageBoxA(0, "Hello World!", "Caption", 0);}}This example shows the minimum requirements for declaring a C# method that is implemented in a native DLL. The method...
sahu
- Jan 6th, 2006
ans:by using1st:using System.Runtime.InteropServicessecond step[DllImport("user32.dll")]use top of the class
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What namespaces are necessary to create a localized application?
System.Globalization, System.Resources.
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What is a multicast delegate?
It is a delegate that points to and eventually fires off several methods.
sahu
- Jan 6th, 2006
Ans:Yes, It is a delegate that points to and eventually fires off several methods.
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What does the parameter Initial Catalog define inside Connection String?
The database name to connect to.
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Which class use to Read/Write data to memory
A) FileStreamB) NetworkStreamC) MemoryStream
naveentej
- Jan 7th, 2006
Ans: MemoryStreamIt is a nonbuffered stream whose encapsulated data is directly accessible in memory(RAM not files on disk).
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How do you import Activex component in to .NET
A) With AXImp.exeB) With Pinvoke.exeC) With Tlbimp.exe
naveentej
- Jan 7th, 2006
An application called AXImp.exe shipped with .Net SDK is used.This application does something similar as Tlbimp.exe does for non graphical COM components.It creates a wrapper component that contains the type information that the .Net runtime can understand.
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What is the use of fixed statement
A) To stop the garbagecollector to move the objects in useB) To dispose the object at the end of the defined scopeC) To tell the garbage collector to move the object is useD) To fix the size of an object.
naveentej
- Jan 7th, 2006
Ans: AThe fixed statement sets a pointer to a managed variable and "pins" that variable during the execution of statement. Without fixed, pointers to managed variables would be of little use since gar...
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How can I access the registry from C# code?
By using the Registry and RegistryKey classes in Microsoft.Win32, you can easily access the registry. The following is a sample that reads a key and displays its value: using System;using Microsoft.Win32;class regTest{public static void Main(String[] args){RegistryKey regKey;Object value;regKey = Registry.LocalMachine;regKey = regKey.OpenSubKey("HARDWARE\DESCRIPTION\System\CentralProcessor\0");value...
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How can I get the ASCII code for a character in C#?
Casting the char to an int will give you the ASCII value: char c = 'f';System.Console.WriteLine((int)c);or for a character in a string: System.Console.WriteLine((int)s[3]);The base class libraries also offer ways to do this with the Convert class or Encoding classes if you need a particular encoding.
sahu
- Jan 8th, 2006
Ans:// Create an ASCII encoding. Encoding ascii = Encoding.ASCII;The base class libraries also offer ways to do this with the Convert class or Encoding classes if you need a particular encoding.
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How do I create a multilanguage, multifile assembly?
Unfortunately, this is currently not supported in the IDE. To do this from the command line, you must compile your projects into netmodules (/target:module on the C# compiler), and then use the command line tool al.exe (alink) to link these netmodules together.
sahu
- Jan 8th, 2006
Ans:Unfortunately, this is currently not supported in the IDE. To do this from the command line, you must compile your projects into netmodules (/target:module on the C# compiler), and then use the command line tool al.exe (alink) to link these netmodules together.
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How do you make CLR enforce overflow checking
A) Using Checked KeywordB) Using Unchecked KeywordC) With Try Catch
naveentej
- Jan 8th, 2006
Ans: A, Using Checked keyword we can enforce arithmetic overflow check within the specified code block.This option is used when we set the Arithmetic Overflow Check to false for the entire application...
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Which of the following explicit type conversion is achieved with out loosing the original data value
A) Byte to LongB) Long to ByteC) Float to intExplanation: Byte stores up to 255 which can easily be stored in a long variable
naveentej
- Jan 8th, 2006
Ans: AThe author's explanation is perfectOptions B and C are utterly opposite
C# Interview Questions
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