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A reference to the dll could not be added
When I add a .dll file as a reference in C# application it shows an error :
17 Answers
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When do you use the “this” keyword? [closed]
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There are several usages of this keyword in C#.
To qualify members hidden by similar name
To have an object pass itself as a parameter to other methods
To have an object return itself from a method
To declare indexers
To declare extension methods
To pass parameters b...
What is the definition of “interface” in object oriented programming
...guarantee, that a certain class can do something.
Consider this piece of C# code here:
using System;
public interface IGenerate
{
int Generate();
}
// Dependencies
public class KnownNumber : IGenerate
{
public int Generate()
{
return 5;
}
}
public class SecretNumber...
The type 'string' must be a non-nullable type in order to use it as parameter T in the generic type
...gs like Nullable<string> so it is disallowed.
Also if you are using C# 3.0 or later you can simplify your code by using auto-implemented properties:
public class WordAndMeaning
{
public string Word { get; set; }
public string Meaning { get; set; }
}
...
What exactly is an “open generic type” in .NET? [duplicate]
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The C# language defines an open type to be a type that's either a type argument or a generic type defined with unknown type arguments:
All types can be classified as either open types or closed types. An open type is a type that...
Literal suffix for byte in .NET?
...ntion of a literal suffix on the MSDN reference for Byte as well as in the C# 4.0 Language Specification. The only literal suffixes in C# are for integer and real numbers as follows:
u = uint
l = long
ul = ulong
f = float
m = decimal
d = double
If you want to use var, you can always cast the byte...
Using a bitmask in C#
...e casts to object in the below code are an unfortunate necessity due to
// C#'s restriction against a where T : Enum constraint. (There are ways around
// this, but they're outside the scope of this simple illustration.)
public static class FlagsHelper
{
public static bool IsSet<T>(T flags...
What is the difference between String.Empty and “” (empty string)?
...nt. Places where they behave differently are:
Default Parameter value in C# 4.0 or higher
void SomeMethod(int ID, string value = string.Empty)
// Error: Default parameter value for 'value' must be a compile-time constant
{
//... implementation
}
Case expression in switch statement
string s...
Literal notation for Dictionary in C#?
I currently have a WebSocket between JavaScript and a server programmed in C#. In JavaScript, I can pass data easily using an associative array:
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Does Java have something like C#'s ref and out keywords?
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No, Java doesn't have something like C#'s ref and out keywords for passing by reference.
You can only pass by value in Java. Even references are passed by value. See Jon Skeet's page about parameter passing in Java for more details.
To do something similar to ...