C#: determine if a class has already been initialized
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I have many classes in an assembly that I can't or don't want to modify. At some point of runtime, I want to know which of them have already been "initialized": static initializer (= static constructor) has run.
Is there a way to do it with reflection or something else?
For information, not every class in an assembly is initialized when the assembly is loaded. This can be easily observed with this piece of code:
public static class Foo
static Foo() MainClass.Value = "Something";
public static void DoSomething() Thread.Sleep(100);
public static class MainClass
public static string Value = "Nothing";
public static void Main()
Console.WriteLine(Value);
Foo.DoSomething();
Console.WriteLine(Value);
Displays:
Nothing
Something
c# reflection
edited Dec 11 '18 at 3:33
Cœur
19.3k10116155
asked Nov 15 '18 at 13:17
Benoit SanchezBenoit Sanchez
296113
|
show 12 more comments
I have many classes in an assembly that I can't or don't want to modify. At some point of runtime, I want to know which of them have already been "initialized": static initializer (= static constructor) has run.
Is there a way to do it with reflection or something else?
For information, not every class in an assembly is initialized when the assembly is loaded. This can be easily observed with this piece of code:
public static class Foo
static Foo() MainClass.Value = "Something";
public static void DoSomething() Thread.Sleep(100);
public static class MainClass
public static string Value = "Nothing";
public static void Main()
Console.WriteLine(Value);
Foo.DoSomething();
Console.WriteLine(Value);
Displays:
Nothing
Something
c# reflection
edited Dec 11 '18 at 3:33
Cœur
19.3k10116155
asked Nov 15 '18 at 13:17
Benoit SanchezBenoit Sanchez
296113
2
"Is there a way to do it with reflection or something else?" No, unless you introduce a flag that you set in the static constructor. But do all your classes even have such a constructor?
– HimBromBeere
Nov 15 '18 at 13:18
3
Please read the question entirely.
– Benoit Sanchez
Nov 15 '18 at 13:20
6
@BenoitSanchez: sounds like a XY-question. What are you actually trying to do, why you think you need to know that? If you need to know if your class is initialized(so something in it is ready to use), you have to introduce a flag that is set in the initialization method.
– Rango
Nov 15 '18 at 13:21
4
Another funny fact is, that even if there was a way to indicate this, you´d shoot yourself in your own foot, because a static constructor is invoked the very first time you use the class in any way. Using reflection to access the class will therefor also run the static constructor, if not already done. So if you ask your class if it was initialized (whatever that actually means), it´ll allways answers: "yes".
– HimBromBeere
Nov 15 '18 at 13:29
2
@Christopher: you really haven't read the question ;-)
– Rango
Nov 15 '18 at 13:36
|
show 12 more comments
I have many classes in an assembly that I can't or don't want to modify. At some point of runtime, I want to know which of them have already been "initialized": static initializer (= static constructor) has run.
Is there a way to do it with reflection or something else?
For information, not every class in an assembly is initialized when the assembly is loaded. This can be easily observed with this piece of code:
public static class Foo
static Foo() MainClass.Value = "Something";
public static void DoSomething() Thread.Sleep(100);
public static class MainClass
public static string Value = "Nothing";
public static void Main()
Console.WriteLine(Value);
Foo.DoSomething();
Console.WriteLine(Value);
Displays:
Nothing
Something
c# reflection
edited Dec 11 '18 at 3:33
Cœur
19.3k10116155
asked Nov 15 '18 at 13:17
Benoit SanchezBenoit Sanchez
296113
I have many classes in an assembly that I can't or don't want to modify. At some point of runtime, I want to know which of them have already been "initialized": static initializer (= static constructor) has run.
Is there a way to do it with reflection or something else?
For information, not every class in an assembly is initialized when the assembly is loaded. This can be easily observed with this piece of code:
public static class Foo
static Foo() MainClass.Value = "Something";
public static void DoSomething() Thread.Sleep(100);
public static class MainClass
public static string Value = "Nothing";
public static void Main()
Console.WriteLine(Value);
Foo.DoSomething();
Console.WriteLine(Value);
Displays:
Nothing
Something
c# reflection
c# reflection
edited Dec 11 '18 at 3:33
Cœur
19.3k10116155
asked Nov 15 '18 at 13:17
Benoit SanchezBenoit Sanchez
296113
edited Dec 11 '18 at 3:33
Cœur
19.3k10116155
asked Nov 15 '18 at 13:17
Benoit SanchezBenoit Sanchez
296113
edited Dec 11 '18 at 3:33
Cœur
19.3k10116155
edited Dec 11 '18 at 3:33
Cœur
19.3k10116155
edited Dec 11 '18 at 3:33
Cœur
19.3k10116155
19.3k10116155
asked Nov 15 '18 at 13:17
Benoit SanchezBenoit Sanchez
296113
asked Nov 15 '18 at 13:17
Benoit SanchezBenoit Sanchez
296113
asked Nov 15 '18 at 13:17
Benoit SanchezBenoit Sanchez
296113
296113
2
"Is there a way to do it with reflection or something else?" No, unless you introduce a flag that you set in the static constructor. But do all your classes even have such a constructor?
– HimBromBeere
Nov 15 '18 at 13:18
3
Please read the question entirely.
– Benoit Sanchez
Nov 15 '18 at 13:20
6
@BenoitSanchez: sounds like a XY-question. What are you actually trying to do, why you think you need to know that? If you need to know if your class is initialized(so something in it is ready to use), you have to introduce a flag that is set in the initialization method.
– Rango
Nov 15 '18 at 13:21
4
Another funny fact is, that even if there was a way to indicate this, you´d shoot yourself in your own foot, because a static constructor is invoked the very first time you use the class in any way. Using reflection to access the class will therefor also run the static constructor, if not already done. So if you ask your class if it was initialized (whatever that actually means), it´ll allways answers: "yes".
– HimBromBeere
Nov 15 '18 at 13:29
2
@Christopher: you really haven't read the question ;-)
– Rango
Nov 15 '18 at 13:36
|
show 12 more comments
2
"Is there a way to do it with reflection or something else?" No, unless you introduce a flag that you set in the static constructor. But do all your classes even have such a constructor?
– HimBromBeere
Nov 15 '18 at 13:18
3
Please read the question entirely.
– Benoit Sanchez
Nov 15 '18 at 13:20
6
@BenoitSanchez: sounds like a XY-question. What are you actually trying to do, why you think you need to know that? If you need to know if your class is initialized(so something in it is ready to use), you have to introduce a flag that is set in the initialization method.
– Rango
Nov 15 '18 at 13:21
4
Another funny fact is, that even if there was a way to indicate this, you´d shoot yourself in your own foot, because a static constructor is invoked the very first time you use the class in any way. Using reflection to access the class will therefor also run the static constructor, if not already done. So if you ask your class if it was initialized (whatever that actually means), it´ll allways answers: "yes".
– HimBromBeere
Nov 15 '18 at 13:29
2
@Christopher: you really haven't read the question ;-)
– Rango
Nov 15 '18 at 13:36
2
2
"Is there a way to do it with reflection or something else?" No, unless you introduce a flag that you set in the static constructor. But do all your classes even have such a constructor?
– HimBromBeere
Nov 15 '18 at 13:18
"Is there a way to do it with reflection or something else?" No, unless you introduce a flag that you set in the static constructor. But do all your classes even have such a constructor?
– HimBromBeere
Nov 15 '18 at 13:18
3
3
Please read the question entirely.
– Benoit Sanchez
Nov 15 '18 at 13:20
Please read the question entirely.
– Benoit Sanchez
Nov 15 '18 at 13:20
6
6
@BenoitSanchez: sounds like a XY-question. What are you actually trying to do, why you think you need to know that? If you need to know if your class is initialized(so something in it is ready to use), you have to introduce a flag that is set in the initialization method.
– Rango
Nov 15 '18 at 13:21
@BenoitSanchez: sounds like a XY-question. What are you actually trying to do, why you think you need to know that? If you need to know if your class is initialized(so something in it is ready to use), you have to introduce a flag that is set in the initialization method.
– Rango
Nov 15 '18 at 13:21
4
4
Another funny fact is, that even if there was a way to indicate this, you´d shoot yourself in your own foot, because a static constructor is invoked the very first time you use the class in any way. Using reflection to access the class will therefor also run the static constructor, if not already done. So if you ask your class if it was initialized (whatever that actually means), it´ll allways answers: "yes".
– HimBromBeere
Nov 15 '18 at 13:29
Another funny fact is, that even if there was a way to indicate this, you´d shoot yourself in your own foot, because a static constructor is invoked the very first time you use the class in any way. Using reflection to access the class will therefor also run the static constructor, if not already done. So if you ask your class if it was initialized (whatever that actually means), it´ll allways answers: "yes".
– HimBromBeere
Nov 15 '18 at 13:29
2
2
@Christopher: you really haven't read the question ;-)
– Rango
Nov 15 '18 at 13:36
@Christopher: you really haven't read the question ;-)
– Rango
Nov 15 '18 at 13:36
|
show 12 more comments
1 Answer
1
active
oldest
votes
As said HimBromBeere, and as confirmed in this article,
A static constructor is called automatically to initialize the class before the first instance is created or any static members are referenced.
So you need to use your class once, a property, a method, whatever, to initialize it... You have no control on it, you can't call it programatically and, if you want to know if the static constructor has been used, you'll use the class, so it could be called at this point...
As said Rango, you can use a flag in your constructor, if you really absolutly need to know...
answered Mar 2 at 11:50
Cerebro 6363Cerebro 6363
365
add a comment |
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As said HimBromBeere, and as confirmed in this article,
A static constructor is called automatically to initialize the class before the first instance is created or any static members are referenced.
So you need to use your class once, a property, a method, whatever, to initialize it... You have no control on it, you can't call it programatically and, if you want to know if the static constructor has been used, you'll use the class, so it could be called at this point...
As said Rango, you can use a flag in your constructor, if you really absolutly need to know...
answered Mar 2 at 11:50
Cerebro 6363Cerebro 6363
365
add a comment |
As said HimBromBeere, and as confirmed in this article,
A static constructor is called automatically to initialize the class before the first instance is created or any static members are referenced.
So you need to use your class once, a property, a method, whatever, to initialize it... You have no control on it, you can't call it programatically and, if you want to know if the static constructor has been used, you'll use the class, so it could be called at this point...
As said Rango, you can use a flag in your constructor, if you really absolutly need to know...
answered Mar 2 at 11:50
Cerebro 6363Cerebro 6363
365
add a comment |
As said HimBromBeere, and as confirmed in this article,
A static constructor is called automatically to initialize the class before the first instance is created or any static members are referenced.
So you need to use your class once, a property, a method, whatever, to initialize it... You have no control on it, you can't call it programatically and, if you want to know if the static constructor has been used, you'll use the class, so it could be called at this point...
As said Rango, you can use a flag in your constructor, if you really absolutly need to know...
answered Mar 2 at 11:50
Cerebro 6363Cerebro 6363
365
As said HimBromBeere, and as confirmed in this article,
A static constructor is called automatically to initialize the class before the first instance is created or any static members are referenced.
So you need to use your class once, a property, a method, whatever, to initialize it... You have no control on it, you can't call it programatically and, if you want to know if the static constructor has been used, you'll use the class, so it could be called at this point...
As said Rango, you can use a flag in your constructor, if you really absolutly need to know...
answered Mar 2 at 11:50
Cerebro 6363Cerebro 6363
365
edited Mar 2 at 11:57
answered Mar 2 at 11:50
Cerebro 6363Cerebro 6363
365
answered Mar 2 at 11:50
Cerebro 6363Cerebro 6363
365
answered Mar 2 at 11:50
Cerebro 6363Cerebro 6363
365
365
add a comment |
add a comment |
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"Is there a way to do it with reflection or something else?" No, unless you introduce a flag that you set in the static constructor. But do all your classes even have such a constructor?
– HimBromBeere
Nov 15 '18 at 13:18
3
Please read the question entirely.
– Benoit Sanchez
Nov 15 '18 at 13:20
6
@BenoitSanchez: sounds like a XY-question. What are you actually trying to do, why you think you need to know that? If you need to know if your class is initialized(so something in it is ready to use), you have to introduce a flag that is set in the initialization method.
– Rango
Nov 15 '18 at 13:21
4
Another funny fact is, that even if there was a way to indicate this, you´d shoot yourself in your own foot, because a static constructor is invoked the very first time you use the class in any way. Using reflection to access the class will therefor also run the static constructor, if not already done. So if you ask your class if it was initialized (whatever that actually means), it´ll allways answers: "yes".
– HimBromBeere
Nov 15 '18 at 13:29
2
@Christopher: you really haven't read the question ;-)
– Rango
Nov 15 '18 at 13:36