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Program in c#
Need a program to search a word with all its Synonymous
ex : If I write screen find all that match of screen , lcd, monitor ,------ and so on -
Does C# support C type macros?
No. C# does not have macros. Keep in mind that what some of the predefined C macros (for example, __LINE__ and __FILE__) give you can also be found in .NET classes like System.Diagnostics (for example, StackTrace and StackFrame), but they'll only work on debug builds.
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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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How do I declare inout arguments in C#?
The equivalent of inout in C# is ref. , as shown in the following example: public void MyMethod (ref String str1, out String str2) {...}When calling the method, it would be called like this: String s1;String s2;s1 = "Hello";MyMethod(ref s1, out s2);Console.WriteLine(s1);Console.WriteLine(s2);Notice that you need to specify ref when declaring the function and calling it.
sahu
- Jan 10th, 2006
Ans:Answer: The equivalent of inout in C# is ref. , as shown in the following example: public void MyMethod (ref String str1, out String str2) {...}When calling the method, it would be called like thi...
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Why do I get a "CS5001: does not have an entry point defined" error when compiling?
The most common problem is that you used a lowercase 'm' when defining the Main method. The correct way to implement the entry point is as follows: class test {static void Main(string[] args) {}}
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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 I simulate optional parameters to COM calls?
You must use the Missing class and pass Missing.Value (in System.Reflection) for any values that have optional parameters.
sahu
- Jan 10th, 2006
Ans:Yes,it is right.Answer: You must use the Missing class and pass Missing.Value (in System.Reflection) for any values that have optional parameters.
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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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How do you specify a custom attribute for the entire assembly (rather than for a class)?
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.
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How do I register my code for use by classic COM clients?
Use the regasm.exe utility to generate a type library (if needed) and the necessary entries in the Windows Registry to make a class available to classic COM clients. Once a class is registered in the Windows Registry with regasm.exe, a COM client can use the class as though it were a COM class.
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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 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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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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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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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.
C# Interview Questions
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