How to define constants in Visual C# like #define in C?

Question

In C you can define constants like this

#define NUMBER 9

so that wherever NUMBER appears in the program it is replaced with 9. But Visual

Answer 1

In C#, per MSDN library, we have the "const" keyword that does the work of the "#define" keyword in other languages.

"...when the compiler encounters a constant identifier in C# source code (for example, months), it substitutes the literal value directly into the intermediate language (IL) code that it produces." ( https://msdn.microsoft.com/en-us/library/ms173119.aspx )

Initialize constants at time of declaration since there is no changing them.

public const int cMonths = 12;

Answer 2

public const int NUMBER = 9;

You'd need to put it in a class somewhere, and the usage would be ClassName.NUMBER

Answer 3

You can't do this in C#. Use a const int instead.

Answer 4

Check How to: Define Constants in C# on MSDN:

In C# the #define preprocessor directive cannot be used to define constants in the way that is typically used in C and C++.

Answer 5

static class Constants
{
    public const int MIN_LENGTH = 5;
    public const int MIN_WIDTH  = 5; 
    public const int MIN_HEIGHT = 6;
}

// elsewhere
public CBox()
{
    length = Constants.MIN_LENGTH; 
    width  = Constants.MIN_WIDTH; 
    height = Constants.MIN_HEIGHT;  
}

Answer 6

What is the "Visual C#"? There is no such thing. Just C#, or .NET C# :)

Also, Python's convention for constants CONSTANT_NAME is not very common in C#. We are usually using CamelCase according to MSDN standards, e.g. public const string ExtractedMagicString = "vs2019";

Source: Defining constants in C#