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Home/C#

WhatisWhatis Latest Questions

Prabhakar Atla
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Prabhakar Atla
Asked: January 29, 2022In: Technology, Website Development

a namespace cannot directly contain members such as fields or methods

  • 1

Define Compiler Error Code CS0116. What does a namespace which cannot directly contain members such as fields or methods in c#? How can you fix it?

a namespace cannot directly contain members such as fields or methodsC#CS0116ErrorNamespacenamespace error
  1. Best Answer
    Prabhakar Atla
    Added an answer on January 29, 2022 at 2:04 pm

    A namespace cannot directly contain members such as fields or methods: If you are new to coding, you may definitely come across a compiler error. If it shows the error code—CS0116, you have to get it fixed. Usually, such errors occur in C#. You will usually notice the error if a namespace cannot dirRead more

    A namespace cannot directly contain members such as fields or methods:

    If you are new to coding, you may definitely come across a compiler error. If it shows the error code—CS0116, you have to get it fixed. Usually, such errors occur in C#. You will usually notice the error if a namespace cannot directly contain members such as fields or methods.

    What Does This Error Signify?

    If you have recently started working on coding or C#, noticing such errors is common. You need to brush up coding concepts and just go through some introductory chapters to get familiar with namespace. 

    What does a namespace error or compiler error code-CS0116 look like?

    namespace DeveloperPublishNamespace

    {

        public int Field1;

        public class DeveloperPublish

        {

            public static void Main()

            {

     

            }

        }

    }

    Error: A namespace cannot directly contain members such as fields or methods

    Solution: Move the fields or methods into a class from namespace.

    Correct use of Namespace – An Example:

    namespace MyNameSpace

    {

       int i; <– THIS NEEDS TO BE INSIDE THE CLASS

     

       class MyClass

       {

          …

       }

    }

    Note: If you can’t recognize what’s “outside” the class, consider the addition/ deletion of misplaced or extra closing bracket(s) }.

    100% Correct Solution—Points to Remember:

    • Remove one of the closing curly braces from the three in a row.
    • Place a curly brace after the Swing Axe function. 
    • The use of a third closing curly brace starts post update function. 
    • SwingAxe Function is currently outside the class.
    • You have used invalid syntax and coding structure.

    Note: Next time, don’t declare a method or field under namespace. They should always be mentioned in the class.

    In Conclusion:

    Thus, namespace error can be easily detected and rectified using the correct way of placing brackets and curly braces. It’s one of the commonest errors that every user when they start working on C#. So, next time you notice a namespace cannot directly contain members such as fields or methods, you need not worry. Just make sure that your syntax is correct and you can easily get rid of the error.

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Prabhakar Atla
  • 0
Prabhakar Atla
Asked: January 26, 2022In: Technology, Website Development

What Is C# Delegate?

  • 0

What is delegate in c#? Can you mention all the essential features, examples, and relevant points? What Is the Process Of Assigning Delegates?

C SharpC#C# Delegatec# delegate exampleDefinitionDelegatedelegate in C# DefinitionWhat Is C# Delegatewhat is delegate in c#
  1. Best Answer
    Prabhakar Atla
    Added an answer on January 26, 2022 at 2:25 pm

    What is C# Delegate? C# Delegate refers to methods with a certain parameter list to define a method signature. You can use a delegate to associate it with any method and a compatible signature type. Users and developers can invoke the method using delegate instances.  You can process delegates to usRead more

    What is C# Delegate?

    C# Delegate refers to methods with a certain parameter list to define a method signature. You can use a delegate to associate it with any method and a compatible signature type. Users and developers can invoke the method using delegate instances. 

    You can process delegates to use smoothen methods as arguments or other methods. All event handlers are triggered using a custom method like a window control. The method used in the process may be the instance method or static method. 

    Using delegate c#, you can modify calls programmatically or even include a code into existing classes. The signature of a method usually never returns a value. However, in delegates, the signature always comes with a return value. 

    In the programming language you can compare a couple of objects in your app. And you can opt for a delegate method for its algorithm through a sort algorithm. 

    What Is the Process Of Assigning Delegates? 

    When you are working on c# delegate, you have to follow all its processes and methods carefully. 

    Step 1: Declaring a Delegate

    This is the primary step. You can declare your delegate by using a keyword and signature. 

    Use the following syntax to declare your delegate: 

    [access modifier] delegate [return type] [delegate name]([parameters]) 

    Step 2: Setting up a Target Method 

    When your step-1 is cleared, you have to set your new target method. In computer programming parlance, it’s also called lambda expression. Just insert an object of the delegate using the appropriate keyword and a passing method with a signature that matches with the signature originally created in step-1. 

    Alternatively, you can create a target method without creating a delegate object. 

    Take for instance; MyDelegate_del=MethodA 

    Step 3: Invoke a Delegate (Optional) 

    It can be further modified or invoked using the () operator symbols. 

    For Example: 

    del.Invoke(“Your Name”); 

    // or 

    del(“Your Name!”); 

    Multicast Delegate: Everything That You Should Know

    Many people ask what is delegate in c#? While we have explained all vital points to it in the above sections, now we’ll look into its vital topic: Multicast Delegate. 

    In simple terms, the multicast delegate is a process of delegating a task through multiple methods. You can use + or += operator to include a new function. Contrarily, if you use – and -=, the operator will remove that function. 

    Generic Delegate:

    Generic Delegate is another crucial C# Delegate Example, which you shouldn’t miss out. Under this process, you have to use a generic type of parameters or return type. While setting targets, the use of generic types must be specified or else your programming may go wrong. 

    In Conclusion:

    C# Delegate is always a tricky and lengthy subject. It might be easy for a programmer to understand all the nuances of Delegates but for a non-tech savvy person, it’s not so simple. 

    However, we have a programming hack for you. If you want a shortcut to a ‘delegate process’, just use the Action and Function command to complete necessary operations. 

    Always remember that function will return a certain value after its processing—while action represents a complete act and won’t return any value.

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  • 1 Answer
  • 216 Views
Prabhakar Atla
  • 0
Prabhakar Atla
Asked: January 26, 2022In: Technology, Website Development

What Is C# Jagged Array?

  • 0

What is the c# jagged array? Can anyone explain the meaning, significance, and features of the C# Jagged Array?

ArrayC SharpC#c# jagged arrayC# Jagged Array DefinitionC# Jagged Array FeaturesDefinitionJagged ArrayWhat is C# Jagged Array
  1. Best Answer
    Prabhakar Atla
    Added an answer on January 26, 2022 at 2:02 pm

    C# Jagged Array Meaning: It is basically an array. All its elements, likewise, are arrays which may be of variable dimensions, lengths, forms, and sizes. These are special array types in C#.   Arrays can be easily initialised upon declaration of specific nature or types. The elements of an array canRead more

    C# Jagged Array Meaning:

    It is basically an array. All its elements, likewise, are arrays which may be of variable dimensions, lengths, forms, and sizes. These are special array types in C#.  

    Arrays can be easily initialised upon declaration of specific nature or types. The elements of an array can be defined as reference types. Such arrays are initialized to null. Under it, it is permissible for a programmer to mix jagged and multidimensional arrays.

    Under this programming system, the number of rows or lines may remain fixed at the declaration time, but the number of columns can vary or be made to vary. Arrays can be two dimensional: one dimensional and two dimensional.

    Following are the main points of special array-types in C#:

    • Mixing jagged and multidimensional arrays are possible
    • It may store arrays instead of literal values, in some cases
    • Arrays can be accessed upon using the specific index number
    • Loops can be used or applied upon to iterate through each element of the jagged array
    • Arrays can increase the ability of high-level languages in programming
    • While working with complex algorithms in programmes, arrays can be useful.
    • In memory management, arrays play a crucial role.

    In Conclusion:

    C# Arrays are capable of storing various values under the name of a single variable. It makes things easier where the need to store data in a multidimensional way using the same variable name arises. It acts as the most important component or aspect of the high-level programming language.

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Prabhakar Atla
  • 0
Prabhakar Atla
Asked: January 26, 2022In: Technology, Website Development

What Is C# Partial Class?

  • 0

What is C# Partial Class? Can you explain the Partial Class in C# meaning, features, and other vital points?

C SharpC#C# Partial ClassC# Partial Class Definitionc# partial methodDefinitionpartial classpartial class in c#What is C# Partial Class
  1. Best Answer
    Prabhakar Atla
    Added an answer on January 26, 2022 at 1:48 pm

    C# Partial Class Meaning C# Partial Class is a special feature of C# that incorporates a special feature to implement the functionality of a single class into several files which are united into a single unit as a class file when the specific application is compiled.  In simple words, C# - Partial CRead more

    C# Partial Class Meaning

    C# Partial Class is a special feature of C# that incorporates a special feature to implement the functionality of a single class into several files which are united into a single unit as a class file when the specific application is compiled. 

    In simple words, C# – Partial Classes and Methods allows the programmer to split the implementation of a class. A programmer programming in C# can gain the advantage of working much faster and on a smoother-scale by splitting the definition of a class over various source files.

    Such source files may have a section of the definition of class. Here, all such parts are joined or combined when the final application is compiled. 

    It usually contains a partial method. 

    Significant Points of C# Partial Class

    • The practical utility of it arises when a programmer, working on a large project, requires a split class definition.
    • This is beneficial for developing programmes as partial keywords can be applied to specify other parts of the same class identifiable by its namespace.
    • In the partial method, the following things are important: partial keyword, return type void, implicitly private and it cannot be virtual.
    • A separate file with a .cs extension is important as every class in C# resides there.
    • A programmer can take the help of a partial modifier to a class, interface, or structure.

    The Conclusion:

    In C#partial class several developers can function in one run time with a single class in separate files. And each code can be added to their respective class without any need to recreate or freshly generate the source file.

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  • 1 Answer
  • 254 Views
aprabha2626
  • 0
aprabha2626
Asked: January 23, 2022In: Technology, Website Development

What is an Assembly in C#?

  • 0

What is an assembly in c#? Explain its meaning and essential points. What are the basic features of Assembly in c#?

.NET applicationAssemblyassembly in c#C#Features of Assembly in c#what is an assembly in c#
  1. Best Answer
    Prabhakar Atla
    Added an answer on January 23, 2022 at 8:29 am

    What is an Assembly in C#? It is a set or group of types built to function in a coordinated way. Assembly in c# acts as a unit and functions in a logical way finally acting as .exe and .dll files. They are the building blocks of .NET applications. To simplify the meaning, we can term it as a file geRead more

    What is an Assembly in C#?

    It is a set or group of types built to function in a coordinated way. Assembly in c# acts as a unit and functions in a logical way finally acting as .exe and .dll files. They are the building blocks of .NET applications.

    To simplify the meaning, we can term it as a file generated automatically by the compiler on the compilation of every .NET application in a successful way.

    They constitute basic or fundamental units of deployment, version control, reuse, activation scoping, and security permissions for .NET-based applications.

    Basic Features of Assembly in C#

    • It can be static (stored on disk in portable executable files) or dynamic (to disk after they have been executed).
    • Static assemblies may incorporate such things as interfaces, classes, and resources like bitmaps, JPEG files, and other resource files.
    • Dynamic assemblies can run directly from memory and may not be saved to disk before execution.
    • Assemblies can be used with the use of development tools like Visual Studio that can create .dll or .exe files and the Windows SDK with modules from other development environments.
    • Assemblies are of two types in .NET. They are: Single file containing all relevant information including Metadata and Manifest and Multi file constituting different .NET binaries or modules that are generated for larger applications. 

    In Conclusion:

    Assembly in c# provides the common language runtime. This helps or enables the programme with all the facts and information it needs to be aware of type implementations.

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aprabha2626
  • 0
aprabha2626
Asked: January 16, 2022In: Technology, Website Development

What is C#?

  • 0

What Is C#? Can you explain the significance, uses, pros and cons of the C# or C Sharp?

C LanguageC SharpC#C# DefinitionCons of C#Definitionprogramming languagePros of C#what is c sharpWhat is C#
  1. Best Answer
    Prabhakar Atla
    Added an answer on January 16, 2022 at 4:06 pm

    What is C Sharp or C#? C# or C-Sharp and not C-hash tag, is a popular programming language invented by Microsoft for the first time. It works on .NET programming language and has immense significance for the developers and programmers.  C# has come from the programming language C. Many of its characRead more

    What is C Sharp or C#?

    C# or C-Sharp and not C-hash tag, is a popular programming language invented by Microsoft for the first time. It works on .NET programming language and has immense significance for the developers and programmers. 

    C# has come from the programming language C. Many of its characteristics resemble C++. It was launched for the first time in 2002, but relevant versions were released every year. C# 8 is the latest version of C-sharp launched in 2019. 

    The Utility of C# Programming Language:

    • For developing web-based apps.
    • For creating new mobile apps.
    • The effective management of web services and online interfaces.
    • Playing live video games.
    • For integrating VR/AR into a PC.
    • Managing database and data apps. 

    Characteristics of C#:

    • Enjoys high popularity
    • Quite simple and easy in relative to other programming languages
    • C# has a lot of loyal community members who help newbies to learn it

     C# Pros and Cons:

    Advantages of C Sharp: 

    • Helps in the effective management of the system.
    • It comes with the benefit of memory backup, in case of accidental deletion of any data.  
    • Relatively cheap to maintain it. 

    Disadvantages of C# or C Sharp: 

    • It is rigid and lacks the flexibility required for .Net.
    • It doesn’t offer superfast speed.

    Conclusion:

    It’s clear that C# has far more merits and advantages for programmers on .NET framework than its demerits. For this very reason, most programmers love to use C# in their programming-related needs. 

    It is one of the most prominently-used software languages, which is highly essential for developing mobile app, desktop apps, and gaming software. The software giant Microsoft uses it excessively for almost all its programming purposes.

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Prabhakar Atla
  • 0
Prabhakar Atla
Asked: December 8, 2021In: Technology, Website Development

What is Unmanaged Code?

  • 0

Do you know what unmanaged code is? Can you tell me some of the advantages and disadvantages of unmanaged code? What are the four factors which are of main concern?

.NET frameworkC#DefinitionDLLUnmanaged CodeUnmanaged Code AdvantagesUnmanaged Code DefinitionUnmanaged Code DisadvantagesWhat is Unmanaged Code
  1. Best Answer
    Prabhakar Atla
    Added an answer on December 8, 2021 at 7:48 am

    Unmanaged Code Definition: Unmanaged code is often known as unsafe code. Because it is aimed at the processor architecture, unmanaged code is reliant on the modern computer, in C#. The CLR handles tasks such as stack management, memory allocation, and release, among other things, so the programmer iRead more

    Unmanaged Code Definition:

    Unmanaged code is often known as unsafe code. Because it is aimed at the processor architecture, unmanaged code is reliant on the modern computer, in C#.

    The CLR handles tasks such as stack management, memory allocation, and release, among other things, so the programmer is free to focus on other things.

    Whenever a computer uses the word “unsafe,” the system recognizes he or it will be in control of the program. However, problems like buffer overflows can occur if a coder creates faulty code.

    When the .NET framework was released, it was necessary to facilitate calling and integrating unmanaged code into C# programs. This one was applicable to any language that used the .NET framework, not even C#.

    There are two main services that provide this assistance. The first one is InteropServices, and the second is Platform Invoke Technologies.

    To ingest unmanaged code, you must match one of four factors to be identified;

    • (specify the function name and the DLL which holds it).
    • Make a class that holds and groups DLLs.
    • Prototypes should be written in managed code.
    • Make a call to a DLL function.

    Advantages Of An Unmanaged Code:

    • Unsafe code enhances the validity and reliability of the program.
    • The coder is accessible at a low level.
    • Unsafe code is used to communicate with the storage.

    Disadvantages Of Unmanaged Code:

    • There is no safety in the app.
    • Errors must be dealt with by the programmer.
    • Garbage disposal is not implemented automatically.
    • When unsafe code is used, data validation is skipped, which might result in errors.
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Prabhakar Atla
  • 0
Prabhakar Atla
Asked: December 6, 2021In: Education, Technology, Website Development

What Are Boxing and Unboxing in C#?

  • 0

What are Boxing and Unboxing known for? Can someone explain its steps? What is the major difference between Unboxing and Boxing in C#?

BoxingC#Unboxing
  1. Best Answer
    Prabhakar Atla
    Added an answer on December 7, 2021 at 4:35 am

    Definition of Boxing and Unboxing: In a garbage-collected heap, boxing is employed to store value types. A value type's implicit conversion to the type object or any interface type provided by this value type is called boxing. When a value type is boxed, an object instance is created on the heap, anRead more

    Definition of Boxing and Unboxing:

    In a garbage-collected heap, boxing is employed to store value types. A value type’s implicit conversion to the type object or any interface type provided by this value type is called boxing. When a value type is boxed, an object instance is created on the heap, and the value is copied into it.

     

    A direct command from a type object to a value type or from an interface type to a value type tool is the interface known as unboxing. The following are the steps involved in an unpacking operation:

    • Ensure that the object instance is a boxed value of the definite value type.
    • The instance’s value is copied into the value-type variable.

    The type system in C# has a concept called boxing and unpacking. By allowing any value of a value-type to be transformed to and from type object using boxing and unpacking, one can connect between value-types and reference-types. Boxing and unpacking allow for a unified view of the type system, allowing any type value to be handled as an object in the end.

     

    ValueTypes must occasionally be converted to Reference Types, referred to as boxing. “Implicit boxing” means that you don’t have to explicitly tell the compiler that you’re boxing an Int32 to an object since it does it for you.

     

    Boxing is the conversion of a value type to an object type, whereas Unboxing converts an object type to a value type. Let’s take a look at the other distinctions between Boxing and Unboxing.

    • A value type is designed to refer to an object in boxing. The process of recovering the value from a boxed object, on the other hand, is known as unpacking.
    • A stack value type is copied to a heap memory object. On the other hand, Unboxing involves copying a heap memory object to a stack memory value type.
    • The difference between boxing and unpacking is that boxing is implicit, and Unboxing is explicit.
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