Description : Can we use “this” inside a static method in C#?
Last Answer : No. We can’t use “this” in a static method.
Description : Do we get an error while executing the “finally” block in C#?
Last Answer : Yes. We may get an error in finally block.
Description : Can we have only “try” block without “catch” block in C#?
Last Answer : Yes, we can have only try block without catch block.
Description : Define what are the differences between static, public and void in C#?
Last Answer : 1. Static classes/methods/variables are accessible throughout the application without creating an instance. The compiler will store the method address as an entry point. 2. Public methods or variables are accessible ... 3. The void is used for the methods to indicate it will not return any value.
Description : Explain the “static” keyword in C#?
Last Answer : “Static” keyword can be used for declaring a static member. If the class is made static then all the members of the class are also made static. If the variable is made static then it will have a single instance and the value change is updated in this instance.
Description : Can you declare an override method to be static if the original method is not static?
Last Answer : No. The signature of the virtual method must remain the same. (Note: Only the keyword virtual is changed to keyword override)
Description : Can you declare the override method static while the original method is nonstatic?
Last Answer : No, you can’t, the signature of the virtual method must remain the same, only the keyword virtual is changed to keyword override.
Description : Why use “finally” block in C#?
Last Answer : Finally block will be executed irrespective of exception. So while executing the code in try block when an exception occurs, control is returned to catch block and at last finally block will be ... the closing connection to database / releasing the file handlers can be kept in finally block.
Description : Will we eventually see a .NET Framework-based version of Java as a competitor to C#?
Last Answer : Apparently not. Microsoft will never offer a complete Java environment because Sun has essentially required that Java licensees implement all of Java-something Microsoft will never do. (Why should it? Does ... she's working in a true Java environment because the familiar libraries won't be there.
Description : Can we override the private virtual method in C#?
Last Answer : No. We can’t override private virtual methods as it is not accessible outside the class.
Description : Can we execute multiple catch blocks in C#?
Last Answer : No. Once an exception has occurred it executes specific exception catch block and the control comes out.
Description : What si the difference between interface and abstractclass Select Answer: 1. interface contain only methods 2. we can't declare a variable for interface 3. interface contain only events 4. None 5. All
Last Answer : Ans : 2 The only Difference between Interface and Abstract class is we can declare a variable in abstract class but we can't declare in variable interface
Description : Can we declare a method as sealed?
Last Answer : In C# a method can’t be declared as sealed. However, when we override a method in a derived class, we can declare the overridden method as sealed. By declaring it as sealed, we can avoid further overriding of this method.
Description : In Visual Basic .NET or Visual C# programming, when would you use Structured Query Language (SQL)? How are they executed?
Last Answer : ADO.NET handles most of the database communication for you behind-thescenes. You would only use SQL statements when generating ad-hoc queries for the database. You execute SQL statements by ... returning statements, such as DELETE, INSERT INTO, or UPDATE statements, use the ExecuteNonQuery method.
Description : Can you change the value of a variable while debugging a C# application?
Last Answer : Yes. If you are debugging via Visual Studio.NET, just go to Immediate window.
Description : How do you generate documentation from the C# file commented properly with a command-line compiler?
Last Answer : Compile it with the /doc switch.
Description : What is the syntax to inherit from a class in C#?
Last Answer : Place a colon and then the name of the base class. Example: class MyNewClass : MyBaseClass
Description : What’s the C# syntax to catch any possible exception?
Last Answer : A catch block that catches the exception of type System.Exception. You can also omit the parameter data type in this case and just write catch {}.
Description : Does C# support multiple-inheritance?
Last Answer : No.
Description : List the differences in C# 2.0.
Last Answer : • Generics • Iterators • Partial class definitions • Nullable Types • Anonymous methods • :: operator • Static classes static class members • Extern keyword • Accessor accessibility • Covariance and Contravariance • Fixed size buffers • Fixed assemblies • #pragma warning
Description : What mechanisms does C# have for the readers, writers problem?
Last Answer : System.Threading.ReaderWriterLock which has methods AcquireReaderLock, ReleaseReaderLock, AcquireWriterLock, and ReleaseWriterLock
Description : Does C# have “friendship”?
Last Answer : Not before C# 2.0
Description : Does C# supports multiple inheritance?
Last Answer : No
Description : Can C# have multiple catch blocks?
Last Answer : Yes
Description : Can C# have global overflow checking?
Description : Name 10 C# keywords.
Last Answer : abstract, event, new, struct, explicit, null, base, extern, object, this
Description : But won't most .NET developers eventually choose C# over Visual Basic.NET?
Last Answer : No. Because the power of the two languages is so similar, the primary factor for developers migrating to the .NET world will probably be the syntax they prefer. Since many more developers ... the dominant language for building Windows applications five years from now will still be Visual Basic.
Description : Isn't C# the native language of .NET?
Last Answer : Every language built on the .NET Framework must use the CLR. The CLR defines core language semantics, and so all of the languages built on it tend to have a great deal in common. The biggest choice a . ... just a little bit more-and so neither is the "native" .NET language. There is no such thing.
Description : Isn't C# just a copy of Java?
Last Answer : In some ways, yes. The semantics of the CLR are quite Java-esque, and so any CLR-based language will have a good deal in common with Java. Creating a language that expresses those semantics in a syntax ... had been free to make some changes to Java, my guess is that C# wouldn't exist today.
Description : Which is better: C# or Java?
Last Answer : The two languages have an awful lot in common, and so in some ways it's natural to try to choose a winner. The fact that each language is often viewed as the flagship of its camp-C# in Microsoft's . ... like the radio. You can do it, but you'll be happier if you choose based on the whole package.
Description : C# provides a default constructor for me. I write a constructor that takes a string as a parameter, but want to keep the no parameter one. How many constructors should I write?
Last Answer : Two. Once you write at least one constructor, C# cancels the freebie constructor, and now you have to write one yourself, even if there’s no implementation in it.
Description : Does C# support multiple inheritance?
Last Answer : No, use interfaces instead.
Description : How do you inherit from a class in C#?
Last Answer : Place a colon and then the name of the base class.
Description : Define what are the advantages of getting and set properties in C#?
Last Answer : 1. The get property accessor is used to return the property value. 2. The set property accessor is used to assign a new value.
Description : Define what are sealed classes in c#?
Last Answer : The sealed modifier is used to prevent derivation from a class. A compile-time error occurs if a sealed class is specified as the base class of another class.
Description : Define what is a basic difference between the while loop and do-while loop in C#?
Last Answer : The while loop tests its condition at the beginning, which means that the enclosed set of statements run for zero or more number of times if the condition evaluates to true. The do while loop iterates a set of statements at least once and then checks the condition at the end.
Description : Define what is the syntax to inherit from a class in C#?
Last Answer : When a class is derived from another class, then the members of the base class become the members of the derived class. The access modifier used while accessing members of the base class specifies ... syntax to inherit a class from another class In C# is as follows: class MyNewClass : MyBaseClass
Description : Define what Command is used to implement properties in C#?
Last Answer : get & set access modifiers are used to implement properties in c#.
Description : Does C# support a variable number of arguments?
Last Answer : Yes, using the params keyword. The arguments are specified as a list of arguments of a specific type, e.g., int. For ultimate flexibility, the type can object. The standard example of a method which uses this approach is System.console.writeLine().
Description : Define what is the main use of delegates in C#?
Last Answer : Delegates are mainly used to define call back methods.
Description : Does C# provide copy constructor?
Last Answer : No, C# does not provide copy constructor.
Description : Is String is Value Type or Reference Type in C#?
Last Answer : A string is an object(Reference Type).
Description : How does C# differ from C++?
Last Answer : C# does not support the #include statement. It uses only using statement. In C#, the class definition does not use a semicolon at the end. C# does not support multiple code inheritance. Casting in ... used on string values. Command line parameters array behave differently in C# as compared to C++.
Description : Define what are the different types of literals in C#?
Last Answer : Boolean literals: True and False are literals of the Boolean type that map to the true and false state, respectively. Integer literals: Used to write values of types Int, uint, long, and ulong. Real ... by a double-quote character, such as © hello . The Null literal: Represents the null-type.