Question about TypeInitializationException
I have noticed something that I quite don't understand. I have ConfigurationProvider class which loads configuration values from database and then Configuration class which parses them and makes them accessible to the rest of my application. (In reality I parse xml configuration but for example I will just replace it with long)
public class ConfigurationProvider
{
public static ConfigurationProvider Provider { get; } = new ConfigurationProvider();
public string GetParameter()
{
// gets configuration parameter from database
}
}
public class Configuration
{
public static long Parameter { get; } = long.Parse(ConfigurationProvider.Provider.Parameter);
}
In case there is not a valid value in database TypeInitializationException will be thrown when accessing Configuration.Parameter; then when I change value in database and access Configuration.Parameter; again I still get exactly the same exception.
So my question is why is this happening? Can you point me to some documentation of this? As far as I understand public static long Parameter { get; } should be initialized only once, once the class Configuration is accessed for the first time. But exception makes me feel that this initialization failed and should be performed once again. Or does this mean that Parameter actually was initialized and it now references given exception?
ps : I know how to fix this so there is no need for code, I just want to understand this issue better than I do now.
c# exception types static initialization
asked Nov 16 '18 at 7:08
just-my-namejust-my-name
340311
add a comment |
I have noticed something that I quite don't understand. I have ConfigurationProvider class which loads configuration values from database and then Configuration class which parses them and makes them accessible to the rest of my application. (In reality I parse xml configuration but for example I will just replace it with long)
public class ConfigurationProvider
{
public static ConfigurationProvider Provider { get; } = new ConfigurationProvider();
public string GetParameter()
{
// gets configuration parameter from database
}
}
public class Configuration
{
public static long Parameter { get; } = long.Parse(ConfigurationProvider.Provider.Parameter);
}
In case there is not a valid value in database TypeInitializationException will be thrown when accessing Configuration.Parameter; then when I change value in database and access Configuration.Parameter; again I still get exactly the same exception.
So my question is why is this happening? Can you point me to some documentation of this? As far as I understand public static long Parameter { get; } should be initialized only once, once the class Configuration is accessed for the first time. But exception makes me feel that this initialization failed and should be performed once again. Or does this mean that Parameter actually was initialized and it now references given exception?
ps : I know how to fix this so there is no need for code, I just want to understand this issue better than I do now.
c# exception types static initialization
asked Nov 16 '18 at 7:08
just-my-namejust-my-name
340311
1
If the type initializer throws the runtime caches it and rethrows the exception every time the class is accessed. The initializer isn't actually run again.
– Mike Zboray
Nov 16 '18 at 8:11
Thank you for clarification.
– just-my-name
Nov 16 '18 at 9:02
add a comment |
I have noticed something that I quite don't understand. I have ConfigurationProvider class which loads configuration values from database and then Configuration class which parses them and makes them accessible to the rest of my application. (In reality I parse xml configuration but for example I will just replace it with long)
public class ConfigurationProvider
{
public static ConfigurationProvider Provider { get; } = new ConfigurationProvider();
public string GetParameter()
{
// gets configuration parameter from database
}
}
public class Configuration
{
public static long Parameter { get; } = long.Parse(ConfigurationProvider.Provider.Parameter);
}
In case there is not a valid value in database TypeInitializationException will be thrown when accessing Configuration.Parameter; then when I change value in database and access Configuration.Parameter; again I still get exactly the same exception.
So my question is why is this happening? Can you point me to some documentation of this? As far as I understand public static long Parameter { get; } should be initialized only once, once the class Configuration is accessed for the first time. But exception makes me feel that this initialization failed and should be performed once again. Or does this mean that Parameter actually was initialized and it now references given exception?
ps : I know how to fix this so there is no need for code, I just want to understand this issue better than I do now.
c# exception types static initialization
asked Nov 16 '18 at 7:08
just-my-namejust-my-name
340311
I have noticed something that I quite don't understand. I have ConfigurationProvider class which loads configuration values from database and then Configuration class which parses them and makes them accessible to the rest of my application. (In reality I parse xml configuration but for example I will just replace it with long)
public class ConfigurationProvider
{
public static ConfigurationProvider Provider { get; } = new ConfigurationProvider();
public string GetParameter()
{
// gets configuration parameter from database
}
}
public class Configuration
{
public static long Parameter { get; } = long.Parse(ConfigurationProvider.Provider.Parameter);
}
In case there is not a valid value in database TypeInitializationException will be thrown when accessing Configuration.Parameter; then when I change value in database and access Configuration.Parameter; again I still get exactly the same exception.
So my question is why is this happening? Can you point me to some documentation of this? As far as I understand public static long Parameter { get; } should be initialized only once, once the class Configuration is accessed for the first time. But exception makes me feel that this initialization failed and should be performed once again. Or does this mean that Parameter actually was initialized and it now references given exception?
ps : I know how to fix this so there is no need for code, I just want to understand this issue better than I do now.
c# exception types static initialization
c# exception types static initialization
asked Nov 16 '18 at 7:08
just-my-namejust-my-name
340311
asked Nov 16 '18 at 7:08
just-my-namejust-my-name
340311
asked Nov 16 '18 at 7:08
just-my-namejust-my-name
340311
asked Nov 16 '18 at 7:08
just-my-namejust-my-name
340311
asked Nov 16 '18 at 7:08
just-my-namejust-my-name
340311
340311
1
If the type initializer throws the runtime caches it and rethrows the exception every time the class is accessed. The initializer isn't actually run again.
– Mike Zboray
Nov 16 '18 at 8:11
Thank you for clarification.
– just-my-name
Nov 16 '18 at 9:02
add a comment |
1
If the type initializer throws the runtime caches it and rethrows the exception every time the class is accessed. The initializer isn't actually run again.
– Mike Zboray
Nov 16 '18 at 8:11
Thank you for clarification.
– just-my-name
Nov 16 '18 at 9:02
1
1
If the type initializer throws the runtime caches it and rethrows the exception every time the class is accessed. The initializer isn't actually run again.
– Mike Zboray
Nov 16 '18 at 8:11
If the type initializer throws the runtime caches it and rethrows the exception every time the class is accessed. The initializer isn't actually run again.
– Mike Zboray
Nov 16 '18 at 8:11
Thank you for clarification.
– just-my-name
Nov 16 '18 at 9:02
Thank you for clarification.
– just-my-name
Nov 16 '18 at 9:02
add a comment |
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1
If the type initializer throws the runtime caches it and rethrows the exception every time the class is accessed. The initializer isn't actually run again.
– Mike Zboray
Nov 16 '18 at 8:11
Thank you for clarification.
– just-my-name
Nov 16 '18 at 9:02