const and static readonly - Difference.

[Guest]

Hi Pals,
I am confused between const and static readonly in C#. I want to know the
difference between then. Please give me clear explanation.
thanks in advance.

 

[Guest]

Dear Kavitha,
The difference is that the value of const is set to a compile time constant,
whereas the static readonly is set at runtime and can be modified by the
containing class (that too only in the variable declaration and in the static
constructor).

Note: Use static readonly when the value is not known at compile time.

Rgds,
John Paul. A
MCAD

 

[Cor Ligthert]

Kavitha,

Did you know that there is a special group for language questions.

microsoft.public.dotnet.languages.csharp

Not that you are not welcome here, however that is more for questions as
this.

(The Static keyword has a complete different meaning in VBNet by instance)

Cor

 

[Guest]

Can you give me an example please.

Dear Kavitha,
The difference is that the value of const is set to a compile time constant,
whereas the static readonly is set at runtime and can be modified by the
containing class (that too only in the variable declaration and in the static
constructor).

Note: Use static readonly when the value is not known at compile time.

Rgds,
John Paul. A
MCAD

 

[Guest]

Dear Kavitha,
Note: Please post the language specific queries to this newsgroup
microsoft.public.dotnet.languages.csharp

Here's the example: The code is self explanatory.

class TestClass
{
public string MachineName;
}


class TestMachine
{
public static readonly TestClass objTestClass = new TestClass();

static void Main(string[] args)
{
objTestClass.MachineName = "PLC 134";

objTestClass = new TestClass(); // It will give an error
message
}
}

Rgds,
John Paul. A
MCAD

 

[Guest]

Yes I Do. thanks for your code.

Dear Kavitha,
Note: Please post the language specific queries to this newsgroup
microsoft.public.dotnet.languages.csharp

Here's the example: The code is self explanatory.

class TestClass
{
public string MachineName;
}


class TestMachine
{
public static readonly TestClass objTestClass = new TestClass();

static void Main(string[] args)
{
objTestClass.MachineName = "PLC 134";

objTestClass = new TestClass(); // It will give an error
message
}
}

Rgds,
John Paul. A
MCAD

Can you give me an example please.