Description : How do you specify a custom attribute for the entire assembly (rather than for a class) ?
Last Answer : Answer: 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 : ... that in an IDE-created project, by convention, these attributes are placed in AssemblyInfo.cs.
Description : List some custom attribute scopes and possible targets.
Last Answer : Assembly – assembly Class – type Delegate - type, return
Description : Write some code for a custom collection class.
Last Answer : using System; using System.Collections; public class Items : IEnumerable { private string[] contents; public Items(string[] contents) { this.contents = contents; } public IEnumerator GetEnumerator() { ... (string item in items) { Console.WriteLine(item); } Console.ReadLine(); } }
Description : Define what is the difference between Custom Control and User Control?
Last Answer : Custom Controls have compiled the code (DLLs), easier to use, difficult to create, and can be placed in toolbox. Drag and Drop controls. Attributes can be set visually at design time. Can be ... the toolbox and dragged - dropped from it. A User Control is shared among the single application files.
Description : Define what is a code group?
Last Answer : A code group is a set of assemblies that share a security context.
Description : Write code to use threading and the lock keyword.
Last Answer : using System; using System.Threading; namespace ConsoleApplication4 { class Class1 { [STAThread] static void Main(string[] args) { ThreadClass tc1 = new ThreadClass(1); ThreadClass tc2 = new ThreadClass( ... Console.WriteLine(threadNumber + " working"); Thread.Sleep(1000); } } } } }
Description : Write some code to declare and use properties.
Last Answer : // instance public string InstancePr { get { return a; } set { a = value; } } //read-only static public static int ClassPr { get { return b; } }
Description : Write some code that declares an array on ints, assigns the values: 0,1,2,5,7,8,11 to that array and use a foreach to do something with those values.
Last Answer : int x = 0, y = 0; int[] arr = new int [] {0,1,2}; foreach (int i in arr) { if (i%2 == 0) x++; else y++; }
Description : Write some code to use a delegate.
Last Answer : Member function with a parameter using System; namespace Console1 { class Class1 { delegate void myDelegate(int parameter1); static void Main(string[] args) { MyClass myInstance = new ... void AMethod(int param1) { Console.WriteLine(param1); } } }
Description : Write some code to implement an indexer.
Last Answer : using System; namespace Console1 { class Class1 { static void Main(string[] args) { MyIndexableClass m = new MyIndexableClass(); Console.WriteLine(m[0]); Console.WriteLine(m[1]); Console.WriteLine(m[2]); Console. ... get { return myData[i]; } set { myData[i] = value; } } } }
Description : Write some code that uses an ArrayList.
Last Answer : ArrayList list = new ArrayList(); list.Add("Hello"); list.Add("World");
Description : Write some code to implement a jagged array.
Last Answer : // Declare the array of two elements: int[][] myArray = new int[2][]; // Initialize the elements: myArray[0] = new int[5] {1,3,5,7,9}; myArray[1] = new int[4] {2,4,6,8};
Description : Write some code to implement a multidimensional array.
Last Answer : int[,] b = {{0, 1}, {2, 3}, {4, 5}, {6, 7}, {8, 9}};
Description : Write some code for do… while.
Last Answer : int x; int y = 0; do { x = y++; Console.WriteLine(x); } while(y < 5);
Description : Write some code for a while loop.
Last Answer : int n = 1; while (n < 6) { Console.WriteLine("Current value of n is {0}", n); n++; }
Description : Write some code for a for loop
Last Answer : for (int i = 1; i <= 5; i++) Console.WriteLine(i);
Description : Write some if… else if… code.
Last Answer : int n=4; if (n==1) Console.WriteLine("n=1"); else if (n==2) Console.WriteLine("n=2"); else if (n==3) Console.WriteLine("n=3"); else Console.WriteLine("n>3");
Description : Write some try…catch…finally code.
Last Answer : // try-catch-finally using System; public class TCFClass { public static void Main () { try { throw new NullReferenceException(); } catch(NullReferenceException e) { Console.WriteLine("{0} exception 1 ... ("exception 2."); } finally { Console.WriteLine("finally block."); } } }
Description : Write some code to overload an operator.
Last Answer : class TempleCompare { public int templeCompareID; public int templeValue; public static bool operator == (TempleCompare x, TempleCompare y) { return (x.templeValue == y.templeValue); } ... templeValue); } public override int GetHashCode() { return templeCompareID; } }
Description : Write code for a case statement.
Last Answer : switch (n) { case 1: x=1; break; case 2: x=2; break; default: goto case 1; }
Description : Write code for an enumeration.
Last Answer : public enum animals {Dog=1,Cat,Bear};
Description : Write some code to box and unbox a value type.
Last Answer : // Boxing int i = 4; object o = i; // Unboxing i = (int) o;
Description : Write code to show how a method can accept a varying number of parameters.
Last Answer : using System; namespace Console1 { class Class1 { static void Main(string[] args) { ParamsMethod(1,"example"); ParamsMethod(1,2,3,4); Console.ReadLine(); } static void ... o in list) { Console.WriteLine(o.ToString()); } } } }
Description : Write some code using interfaces, virtual methods, and an abstract class.
Last Answer : using System; public interface Iexample1 { int MyMethod1(); } public interface Iexample2 { int MyMethod2(); } public abstract class ABSExample : Iexample1, Iexample2 { public ABSExample( ... override void VIRTMethod2() { System.Console.WriteLine("VIRTMethod2 has been overridden"); } }
Description : Describe how to use code to retrieve resources at run time.
Last Answer : You must first create an instance of the ResourceManager class that is associated with the assembly that contains the desired resource. You can then use the GetString method to retrieve string resources or the GetObject method to retrieve object resources.
Description : Briefly highlight the differences between imperative and declarative security as they pertain to code access security.
Last Answer : Imperative security is implemented by calling methods of Permission objects in code at run time. Declarative security is configured by attaching attributes representing permissions to classes ... request assembly-wide permissions using the Assembly (assembly) directive with declarative security.
Description : Explain how to convert data in legacy code page formats to the Unicode format.
Last Answer : You can use the Encoding.Convert method to convert data between encoding types. This method requires instances of both encoding types and an array of bytes that represents the data to be converted. ... GetBytes method and can convert an array of bytes back to chars with the Encoding.GetChars method.
Description : Describe how to retrieve the ASCII key code from a keystroke. How would you retrieve key combinations for non-ASCII keys?
Last Answer : Keystrokes can be intercepted by handling the KeyPress and KeyDown events. Both of these events relay information to their handling methods in the form of their EventArgs. The KeyPressEventArgs, ... you would handle the KeyDown event and use the properties exposed by the KeyEventArgs instance.
Description : What is unsafe code?
Last Answer : Unsafe code bypasses type safety and memory management.
Description : Why is the virtual keyword used in code?
Last Answer : The Virtual keyword is used in code to define methods and the properties that can be overridden in derived classes.
Description : How can you tell the application to look for assemblies at the locations other than its own install ?
Last Answer : Answer: Use the directive in the XML .config file for a given application.
Description : Why is it a bad idea to throw your own exceptions?
Last Answer : Well, if at that point you know that an error has occurred, then why not write the proper code to handle that error instead of passing a new Exception object to the catch block? Throwing your own exceptions signifies some design flaws in the project.
Description : Define what is the main use of delegates in C#?
Last Answer : Delegates are mainly used to define call back methods.
Description : Define what is the use of the return statement?
Last Answer : The return statement is associated with procedures (methods or functions). On executing the return statement, the system passes the control from the called procedure to the calling procedure. This ... the currently executed code to return some value to the caller of the currently executed code.
Description : Define what is the use of a goto statement?
Last Answer : The goto statement is also included in the C# language. This goto can be used to jump from inside a loop to outside. But jumping from outside to inside a loop is not allowed.
Description : Define what is the use of the abstract keyword?
Last Answer : The modifier abstract is a keyword used with a class, to indicate that this class cannot itself have direct instances or objects, and it is intended to be only a ‘base’ class to other classes.
Description : What is purpose of Assembly Linker or define SDK Tool in .NET Framework?
Last Answer : Answer: In .NET whole the working should be with the helps of DLLs.So all of Visual Studio .Net compilers gernate assemblies or u can say dll.If we want to create an assembly with ... Studio .Net .This multi file can contain modules that are written in diffrenet langauage in one application.
Description : What does the Initial Catalog parameter define in the connection string?
Last Answer : The database name to connect to.
Description : Define what are the difference between const and readonly?
Last Answer : A const cannot be static, while readonly can be static. A const need to be declared and initialized at declaration only, while a readonly can be initialized at the declaration or by the code in the ... A const's value is evaluated at design time, while a read-only value is evaluated at runtime.
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 is a New modifier?
Last Answer : The new modifier hides a member of the base class. C# supports only hide by signature.
Description : Define what is the Static Method?
Last Answer : It is possible to declare a method as Static provided that they don’t attempt to access any instance data or other instance methods.
Description : Define what is the difference between an abstract method & virtual method?
Last Answer : An Abstract method does not provide an implementation and forces overriding to the deriving class (unless the deriving class also an abstract class), whereas the virtual method has an ... abstract method does not provide implementation & forces the derived class to override the method.
Description : Define what is the difference between a class and an Interface?
Last Answer : 1. Abstract classes can have implementations for some of its members, but the interface can't have implementation for any of its members. 2. Interfaces cannot have fields whereas an ... 5. Abstract class members can have access modifiers whereas interface members cannot have access modifiers.
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 the main difference between a sub procedure and a function?
Last Answer : Sub procedures do not return a value, while functions do.
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 is a static member?
Last Answer : The member defined as static which can be invoked directly from the class level, rather than from its instance.