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Abstract usage in C#
Can any one give real time example for abstract class and virtual function plz in c#(.NET)
cse.jai
- Jan 20th, 2012
An abstract class is a class that cannot be instantiated. The purpose of an abstract class is to provide a common definition of a base class that multiple derived classes can share. For example, a cla...
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How do I make a DLL in C#?
You need to use the /target:library compiler option.
masterubaid
- Aug 7th, 2009
There is no Issue to make dll in C#...Go to Project and Select "Class Library" and work as you work in Usual FORM by making Classes or functions ....The only difference is that when we are m...
swag
- Dec 26th, 2005
Open the property page of the Project File and thenopen CommonProperties -> Genaral ->Output Typechange the output type to class library and build the application then u'll get a dll file.also i...
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Does C# support templates?
No. However, there are plans for C# to support a type of template known as a generic. These generic types have similar syntax but are instantiated at run time as opposed to compile time. You can read more about them here.
pambatman
- Apr 15th, 2007
Generics are a new feature in version 2.0 of the C# language and the common language runtime (CLR). Generics introduce to the .NET Framework the concept of type parameters, which make it possible to d...
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How do you implement thread synchronization (Object.Wait, Notify,and CriticalSection) in C#?
You want the lock statement, which is the same as Monitor Enter/Exit: lock(obj) {// code}translates to: try {CriticalSection.Enter(obj);// code} finally {CriticalSection.Exit(obj);}
jaganmohan2
- Apr 18th, 2007
A thread is simply a separate stream of execution that takes place simultaneously with and independently of everything else that might be happening. A thread can synchronize itself with another thread...
sahu
- Jan 10th, 2006
ans:yes,it is right.lock statement, which is the same as Monitor Enter/Exit: lock(obj) {// code}translates to: try {CriticalSection.Enter(obj);// code} finally {CriticalSection.Exit(obj);}
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How do I create a multilanguage, single-file assembly?
This is currently not supported by Visual Studio .NET.
ramesh
- Jun 18th, 2007
It is not possible
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How do I convert a string to an int in C#?
Here's an example: using System;class StringToInt{public static void Main(){String s = "105";int x = Convert.ToInt32(s);Console.WriteLine(x);}}
Viktor Toman
- Apr 13th, 2011
One more way:String str = "123";Int32 num;Boolean converted = Int32.TryParse(str, out num);
sahu
- Jan 6th, 2006
Ans:by using onvert.ToInt32(string)ExampleString s = "45";int x = Convert.ToInt32(s);
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How does one compare strings in C#?
In the past, you had to call .ToString() on the strings when using the == or != operators to compare the strings' values. That will still work, but the C# compiler now automatically compares the values instead of the references when the == or != operators are used on string types. If you actually do want to compare references, it can be done as follows: if ((object) str1 == (object) str2) { ... }Here's...
Rana
- May 24th, 2007
You can use a.Equals(b) to compare and return a bool value where both a and b are strings.
sahu
- Jan 8th, 2006
Ans:The .NET Framework provides several methods to compare the values of strings.i am giving few methods nameLists of methodString.Compare:Compares the values of two strings. Returns an integer value....
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What is the difference between a struct and a class in C#?
From language spec:The list of similarities between classes and structs is as follows. Longstructs can implement interfaces and can have the same kinds of members as classes. Structs differ from classes in several important ways; however, structs are value types rather than reference types, and inheritance is not supported for structs. Struct values are stored on the stack or in-line. Careful programmers...
samiksc
- Dec 7th, 2005
Following are the main points of difference between classes and structs in C#:Value type vs Reference type: Structs are value type and classes are reference type. Whenever a struct object is assigned ...
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How is method overriding different from overloading?
When overriding, you change the method behavior for a derived class. Overloading simply involves having a method with the same name within the class.
learnasp
- Oct 11th, 2007
Overriding a method involves changing the business logic og the method, however the return type and parameters remain same. However in overloading a method you can have multiple methods with same name but different signatures.
sahu
- Jan 9th, 2006
Ans:Answer: When overriding, you change the method behavior for a derived class. Overloading simply involves having a method with the same name within the class. function checkf(form) { var f = document.form1;if (document.form1.cmt.value=='') { alert('Please enter the comment'); return false; }}
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What is an abstract class?
A class that cannot be instantiated. A concept in C++ known as pure virtual method. A class that must be inherited and have the methods over-ridden. Essentially, it is a blueprint for a class without any implementation.
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How can you overload a method?
Different parameter data types, different number of parameters, different order of parameters.
learnasp
- Oct 11th, 2007
A method can be overloaded by having different parameters as in different type of parameters and well different number of parameters.Also, if the parameter types are different than you can also have d...
sahu
- Dec 12th, 2005
Ans:Different parameter data types, different number of parameters, different order of parameters
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Can you store multiple data types in System.Array?
No.
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What is the difference between the System.Array.CopyTo() and System.Array.Clone()?
The first one performs a deep copy of the array, the second one is shallow.
dotnetasit
- Feb 21st, 2008
I felt the need of this posting because I have seen postings (not only in this forum but also in many others) saying that "CopyTo() makes a deep copy and Clone() makes a shallow copy." ...
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Can multiple catch blocks be executed?
No, once the proper catch code fires off, the control is transferred to the finally block (if there are any), and then whatever follows the finally block.
samiksc
- Jan 9th, 2006
No: only one catch block will be executed for an exception. We can write several catch blocks below a try block. When an exception generates all these catch blocks will be scanned sequentially for a m...
yazhini
- Dec 14th, 2005
No.Multiple catch blocks will not be executed. But, we can use multiple catch blocks for a try block.The respective catch block will get executed according to the error arises.
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What is the difference between // comments, /* */ comments and /// comments?
Single-line, multi-line and XML documentation comments.
ushalakshmi
- May 7th, 2008
// Is for Single-Line Comments./* */ Is for Multi-Line Comments./// For XML Documentation Comments
sahu
- Dec 14th, 2005
Ans:// for single comments/* */ for multiple cmments/// for XML documentation comments.
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What is the difference between the Debug class and Trace class?
Documentation looks the same. Use Debug class for debug builds, use Trace class for both debug and release builds.
vaibhav Tyagi
- Oct 2nd, 2007
the Debug and the Trace classes are available in the Microsoft .NET Framework. You can use these classes to provide information about the performance of an application either during applicatio...
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What is the role of the DataReader class in ADO.NET connections?
It returns a read-only dataset from the data source when the command is executed.
Rahul Prashant Singh
- Oct 14th, 2007
DataReader Class represents a read-only and forward-only stream of data.An instance of this class is used to hold the data returned by executing the Select statement in the DBCommand object using Executereader() method of the DBCommand Class.
swag
- Dec 24th, 2005
When the command is executed it provides a read-only farward-only dataset from the datsource which requires a connection to be open.
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How do you inherit from a class in C#?
Place a colon and then the name of the base class. Notice that it's double colon in C++.
nitin
- Dec 11th, 2006
Lets us say there are 2 claases ,Class A and ClassB.ClassA -BaseClass,ClassB-derived class ClassA{}ClassB:ClassA(baseclass){}here we can say ClassB is derived from classA.Hope this is right.
sahu
- Dec 10th, 2005
Ans:Placing Colon(:)Let's exampleclass x{//code}class y:x(here drive class placing colon){//code}
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Are private class-level variables inherited?
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What is CTS?
Skill/Topic: BeginnerA) Common Translation systemB) Csharp Type SystemC) Common Type SystemD) Constants Translation Specification
C# Interview Questions
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