What is managed or unmanaged code in programming

Question

I am using a specific command in in my C  code  which works well  However  it is said to misbehave in  unmanaged  code   What is managed or unmanaged code

User · Answer

Managed code is what C  Net  VB Net  F  Net etc compilers create  It runs on the CLR  which among other things offers services like garbage collection  and reference checking  and much more  So think of it as  my code is managed by the CLR   On the other hand  unmanaged code compiles straight to machine code  It doesn t manage by CLR

User · Answer

Managed Code    Code that runs under a  contract of cooperation  with   the common language runtime  Managed code must supply the metadata   necessary for the runtime to provide services such as memory   management  cross-language integration  code access security  and    automatic lifetime control of objects  All code based on Microsoft   intermediate language  MSIL  executes as managed code        Un-Managed Code    Code that is created without regard for the   conventions and requirements of the common language runtime  Unmanaged   code executes in the common language runtime environment with minimal   services  for example  no garbage collection  limited debugging  and   so on     Reference  http   www dotnetspider com forum 11612-difference-between-managed-and-unmanaged-code aspx

User · Answer

Here is some text from MSDN about unmanaged code      Some library code needs to call into unmanaged code  for example  native code APIs  such as Win32   Because this means going outside the security perimeter for managed code  due caution is required    Here is some other complimentary explication about Managed code    Code that is executed by the CLR  Code that targets the common language runtime  the foundation of the  NET Framework  is known as managed code  Managed code supplies the metadata necessary for the CLR to provide services such as memory management  cross-language integration  code access security  and automatic lifetime control of objects  All code based on IL executes as managed code  Code that executes under the CLI execution environment    For your problem   I think it s because NUnit execute your code for UnitTesting and might have some part of it that is unmanaged  But I am not sure about it  so do not take this for gold  I am sure someone will be able to give you more information about it  Hope it helps

User · Answer

Here is some text from MSDN about unmanaged code      Some library code needs to call into unmanaged code  for example  native code APIs  such as Win32   Because this means going outside the security perimeter for managed code  due caution is required    Here is some other complimentary explication about Managed code    Code that is executed by the CLR  Code that targets the common language runtime  the foundation of the  NET Framework  is known as managed code  Managed code supplies the metadata necessary for the CLR to provide services such as memory management  cross-language integration  code access security  and automatic lifetime control of objects  All code based on IL executes as managed code  Code that executes under the CLI execution environment    For your problem   I think it s because NUnit execute your code for UnitTesting and might have some part of it that is unmanaged  But I am not sure about it  so do not take this for gold  I am sure someone will be able to give you more information about it  Hope it helps

User · Answer

Managed code runs inside the environment of CLR i e   NET runtime In short all IL are managed code But if you are using some third party software example VB6 or VC   component they are unmanaged code as  NET runtime  CLR  does not have control over the source code execution of the language

User · Answer

Basically unmanaged code is code which does not run under the  NET CLR  aka not VB NET  C   etc    My guess is that NUnit has a runner wrapper which is not  NET code  aka C

User · Answer

NUnit loads the unit tests in a seperate AppDomain  and I assume the entry point is not being called  probably not needed   hence the entry assembly is null

User · Answer

In as few words as possible    managed code    NET programs unmanaged code    normal  programs

User · Answer

This is a good article about the subject   To summarize     Managed code is not compiled to machine code but to an intermediate language which is interpreted and executed by some service on a machine and is therefore operating within a  hopefully   secure framework which handles dangerous things like memory and threads for you  In modern usage this frequently means  NET but does not have to        An application program that is executed within a runtime engine   installed in the same machine  The application cannot run without it    The runtime environment provides the general library of software   routines that the program uses and typically performs memory   management  It may also provide just-in-time  JIT  conversion from   source code to executable code or from an intermediate language to   executable code  Java  Visual Basic and  NET s Common Language Runtime    CLR  are examples of runtime engines    Read more     Unmanaged code is compiled to machine code and therefore executed by the OS directly  It therefore has the ability to do damaging powerful things Managed code does not  This is how everything used to work  so typically it s associated with old stuff like  dlls       An executable program that runs by itself  Launched from the operating   system  the program calls upon and uses the software routines in the   operating system  but does not require another software system to be   used  Assembly language programs that have been assembled into machine   language and C C   programs compiled into machine language for a   particular platform are examples of unmanaged code  Read more     Native code is often synonymous with Unmanaged  but is not identical

User · Answer

NUnit loads the unit tests in a seperate AppDomain  and I assume the entry point is not being called  probably not needed   hence the entry assembly is null

User · Answer

From Pro C  5 and the  NET 4 5 Framework      Managed vs  Unmanaged Code    Perhaps the most important point to understand about the C  language is that it can produce code that   can execute only within the  NET runtime  you could never use C  to build a native COM server or an   unmanaged C C   application   Officially speaking  the term used to describe the code targeting the    NET runtime is managed code  The binary unit that contains the managed code is termed an assembly    more details on assemblies in just a bit   Conversely  code that cannot be directly hosted by the  NET   runtime is termed unmanaged code

User · Answer

NUnit loads the unit tests in a seperate AppDomain  and I assume the entry point is not being called  probably not needed   hence the entry assembly is null

User · Answer

First of all understand this  before  NET framework  Microsoft were providing the stand-alone products like MFC  Visual C     VB  FoxPro etc    In 2002  Microsoft combined its products and made  NET framework  Now there is a difference between how code was executed before and how code is managed and executed in  NET framework  Microsoft introduced concept of CLR with  NET framework which compiles the code coming from any supported lanugague of  NET framework and provide additional functionalities like memory mangement  garbage collection etc  But  such CLR features weren t available directly before       So if you are creating library code in  NET framework  compiled with   CLR  then that is called Managed code  You can use this library   further in other  NET application project  and there too  CLR will   understand how it was compiled before  and that s why it remains your   manage code    OTOH if you want to use the libraries that were written prior to  NET framework then you can do with certain limitations  but remember  since CLR wasn t there at that time  so now  CLR won t understand and compile this code again  And this will be called unmanaged code  Please note that  libraries assembilies created by some third party to provide certain features tool may also be considered as unmanage code if is not CLR compatiblie    In laymen terms  Manage code is something which your CLR understands and can compile it on its own for further execution  In  NET framework   from any language thats work on  NET framework  When code goes to CLR then code supply some meta data information  so that CLR can provide you features specified here  Few of them are Garbage collection  Performance improvements  cross-language integration  memory management etc   OTOH  unmanged code is something specific to machine and ready to use  no need to process it further

User · Answer

In as few words as possible    managed code    NET programs unmanaged code    normal  programs

User · Answer

From Pro C  5 and the  NET 4 5 Framework      Managed vs  Unmanaged Code    Perhaps the most important point to understand about the C  language is that it can produce code that   can execute only within the  NET runtime  you could never use C  to build a native COM server or an   unmanaged C C   application   Officially speaking  the term used to describe the code targeting the    NET runtime is managed code  The binary unit that contains the managed code is termed an assembly    more details on assemblies in just a bit   Conversely  code that cannot be directly hosted by the  NET   runtime is termed unmanaged code

User · Answer

Managed Code  - Code which MSIL  intermediate language  form is developed after the language compiler compilation and directly executed by CLR called managed code  eg - All 61 language code supported by  net framework  Unmanaged Code - code that developed before  net for which  MSIL form is not available and it is executed by CLR directly rather CLR will redirect to operating system this is known as unmanaged code   eg -COM Win32 APIs

User · Answer

NUnit loads the unit tests in a seperate AppDomain  and I assume the entry point is not being called  probably not needed   hence the entry assembly is null

User · Answer

Managed Code  code written in  NET language like C   VB NET  UnManaged Code  code not written in  NET language and MSIL does not understand what it is and can not run under CLR  like third-party controls we used in our  NET applications which is not created in  NET languages

User · Answer

In as few words as possible    managed code    NET programs unmanaged code    normal  programs

User · Answer

This is a good article about the subject   To summarize     Managed code is not compiled to machine code but to an intermediate language which is interpreted and executed by some service on a machine and is therefore operating within a  hopefully   secure framework which handles dangerous things like memory and threads for you  In modern usage this frequently means  NET but does not have to        An application program that is executed within a runtime engine   installed in the same machine  The application cannot run without it    The runtime environment provides the general library of software   routines that the program uses and typically performs memory   management  It may also provide just-in-time  JIT  conversion from   source code to executable code or from an intermediate language to   executable code  Java  Visual Basic and  NET s Common Language Runtime    CLR  are examples of runtime engines    Read more     Unmanaged code is compiled to machine code and therefore executed by the OS directly  It therefore has the ability to do damaging powerful things Managed code does not  This is how everything used to work  so typically it s associated with old stuff like  dlls       An executable program that runs by itself  Launched from the operating   system  the program calls upon and uses the software routines in the   operating system  but does not require another software system to be   used  Assembly language programs that have been assembled into machine   language and C C   programs compiled into machine language for a   particular platform are examples of unmanaged code  Read more     Native code is often synonymous with Unmanaged  but is not identical

User · Answer

This is a good article about the subject   To summarize     Managed code is not compiled to machine code but to an intermediate language which is interpreted and executed by some service on a machine and is therefore operating within a  hopefully   secure framework which handles dangerous things like memory and threads for you  In modern usage this frequently means  NET but does not have to        An application program that is executed within a runtime engine   installed in the same machine  The application cannot run without it    The runtime environment provides the general library of software   routines that the program uses and typically performs memory   management  It may also provide just-in-time  JIT  conversion from   source code to executable code or from an intermediate language to   executable code  Java  Visual Basic and  NET s Common Language Runtime    CLR  are examples of runtime engines    Read more     Unmanaged code is compiled to machine code and therefore executed by the OS directly  It therefore has the ability to do damaging powerful things Managed code does not  This is how everything used to work  so typically it s associated with old stuff like  dlls       An executable program that runs by itself  Launched from the operating   system  the program calls upon and uses the software routines in the   operating system  but does not require another software system to be   used  Assembly language programs that have been assembled into machine   language and C C   programs compiled into machine language for a   particular platform are examples of unmanaged code  Read more     Native code is often synonymous with Unmanaged  but is not identical

User · Answer

Here is some text from MSDN about unmanaged code      Some library code needs to call into unmanaged code  for example  native code APIs  such as Win32   Because this means going outside the security perimeter for managed code  due caution is required    Here is some other complimentary explication about Managed code    Code that is executed by the CLR  Code that targets the common language runtime  the foundation of the  NET Framework  is known as managed code  Managed code supplies the metadata necessary for the CLR to provide services such as memory management  cross-language integration  code access security  and automatic lifetime control of objects  All code based on IL executes as managed code  Code that executes under the CLI execution environment    For your problem   I think it s because NUnit execute your code for UnitTesting and might have some part of it that is unmanaged  But I am not sure about it  so do not take this for gold  I am sure someone will be able to give you more information about it  Hope it helps

User · Answer

Basically unmanaged code is code which does not run under the  NET CLR  aka not VB NET  C   etc    My guess is that NUnit has a runner wrapper which is not  NET code  aka C

User · Answer

Basically unmanaged code is code which does not run under the  NET CLR  aka not VB NET  C   etc    My guess is that NUnit has a runner wrapper which is not  NET code  aka C

User · Answer

When you think of unmanaged  think machine-specific  machine-level code   Like x86 assembly language   Unmanaged  native  code is compiled and linked to run directly on the processor it was designed for  excluding all the OS stuff for the moment   It s not portable  but it is fast   Very simple  stripped down code   Managed code is everything from Java to old Interpretive BASIC  or anything that runs under  NET   Managed code typically is compiled to an intermediate level P-Code or byte code set of instructions   These are not machine-specific instructions  although they look similar to assembly language   Managed code insulates the program from the machine it s running on  and creates a secure boundary in which all memory is allocated indirectly  and generally speaking  you don t have direct access to machine resources like ports  memory address space  the stack  etc   The idea is to run in a more secure environment    To convert from a managed variable  say  to an unmanaged one  you have to get to the actual object itself   It s probably wrapped or boxed in some additional packaging   UNmanaged variables  like an  int   say  - on a 32 bit machine - takes exactly 4 bytes   There is no overhead or additional packaging   The process of going from managed to unmanaged code - and back again - is called  marshaling    It allows your programs to cross the boundary

User · Answer

Basically unmanaged code is code which does not run under the  NET CLR  aka not VB NET  C   etc    My guess is that NUnit has a runner wrapper which is not  NET code  aka C

User · Answer

First of all understand this  before  NET framework  Microsoft were providing the stand-alone products like MFC  Visual C     VB  FoxPro etc    In 2002  Microsoft combined its products and made  NET framework  Now there is a difference between how code was executed before and how code is managed and executed in  NET framework  Microsoft introduced concept of CLR with  NET framework which compiles the code coming from any supported lanugague of  NET framework and provide additional functionalities like memory mangement  garbage collection etc  But  such CLR features weren t available directly before       So if you are creating library code in  NET framework  compiled with   CLR  then that is called Managed code  You can use this library   further in other  NET application project  and there too  CLR will   understand how it was compiled before  and that s why it remains your   manage code    OTOH if you want to use the libraries that were written prior to  NET framework then you can do with certain limitations  but remember  since CLR wasn t there at that time  so now  CLR won t understand and compile this code again  And this will be called unmanaged code  Please note that  libraries assembilies created by some third party to provide certain features tool may also be considered as unmanage code if is not CLR compatiblie    In laymen terms  Manage code is something which your CLR understands and can compile it on its own for further execution  In  NET framework   from any language thats work on  NET framework  When code goes to CLR then code supply some meta data information  so that CLR can provide you features specified here  Few of them are Garbage collection  Performance improvements  cross-language integration  memory management etc   OTOH  unmanged code is something specific to machine and ready to use  no need to process it further

User · Answer

Managed Code  code written in  NET language like C   VB NET  UnManaged Code  code not written in  NET language and MSIL does not understand what it is and can not run under CLR  like third-party controls we used in our  NET applications which is not created in  NET languages

User · Answer

Managed code runs inside the environment of CLR i e   NET runtime In short all IL are managed code But if you are using some third party software example VB6 or VC   component they are unmanaged code as  NET runtime  CLR  does not have control over the source code execution of the language

User · Answer

Managed Code  - Code which MSIL  intermediate language  form is developed after the language compiler compilation and directly executed by CLR called managed code  eg - All 61 language code supported by  net framework  Unmanaged Code - code that developed before  net for which  MSIL form is not available and it is executed by CLR directly rather CLR will redirect to operating system this is known as unmanaged code   eg -COM Win32 APIs

User · Answer

Managed code is what C  Net  VB Net  F  Net etc compilers create  It runs on the CLR  which among other things offers services like garbage collection  and reference checking  and much more  So think of it as  my code is managed by the CLR   On the other hand  unmanaged code compiles straight to machine code  It doesn t manage by CLR

User · Answer

Managed Code    Code that runs under a  contract of cooperation  with   the common language runtime  Managed code must supply the metadata   necessary for the runtime to provide services such as memory   management  cross-language integration  code access security  and    automatic lifetime control of objects  All code based on Microsoft   intermediate language  MSIL  executes as managed code        Un-Managed Code    Code that is created without regard for the   conventions and requirements of the common language runtime  Unmanaged   code executes in the common language runtime environment with minimal   services  for example  no garbage collection  limited debugging  and   so on     Reference  http   www dotnetspider com forum 11612-difference-between-managed-and-unmanaged-code aspx

User · Answer

In as few words as possible    managed code    NET programs unmanaged code    normal  programs

User · Answer

When you think of unmanaged  think machine-specific  machine-level code   Like x86 assembly language   Unmanaged  native  code is compiled and linked to run directly on the processor it was designed for  excluding all the OS stuff for the moment   It s not portable  but it is fast   Very simple  stripped down code   Managed code is everything from Java to old Interpretive BASIC  or anything that runs under  NET   Managed code typically is compiled to an intermediate level P-Code or byte code set of instructions   These are not machine-specific instructions  although they look similar to assembly language   Managed code insulates the program from the machine it s running on  and creates a secure boundary in which all memory is allocated indirectly  and generally speaking  you don t have direct access to machine resources like ports  memory address space  the stack  etc   The idea is to run in a more secure environment    To convert from a managed variable  say  to an unmanaged one  you have to get to the actual object itself   It s probably wrapped or boxed in some additional packaging   UNmanaged variables  like an  int   say  - on a 32 bit machine - takes exactly 4 bytes   There is no overhead or additional packaging   The process of going from managed to unmanaged code - and back again - is called  marshaling    It allows your programs to cross the boundary

User · Answer

Here is some text from MSDN about unmanaged code      Some library code needs to call into unmanaged code  for example  native code APIs  such as Win32   Because this means going outside the security perimeter for managed code  due caution is required    Here is some other complimentary explication about Managed code    Code that is executed by the CLR  Code that targets the common language runtime  the foundation of the  NET Framework  is known as managed code  Managed code supplies the metadata necessary for the CLR to provide services such as memory management  cross-language integration  code access security  and automatic lifetime control of objects  All code based on IL executes as managed code  Code that executes under the CLI execution environment    For your problem   I think it s because NUnit execute your code for UnitTesting and might have some part of it that is unmanaged  But I am not sure about it  so do not take this for gold  I am sure someone will be able to give you more information about it  Hope it helps

User · Answer

This is a good article about the subject   To summarize     Managed code is not compiled to machine code but to an intermediate language which is interpreted and executed by some service on a machine and is therefore operating within a  hopefully   secure framework which handles dangerous things like memory and threads for you  In modern usage this frequently means  NET but does not have to        An application program that is executed within a runtime engine   installed in the same machine  The application cannot run without it    The runtime environment provides the general library of software   routines that the program uses and typically performs memory   management  It may also provide just-in-time  JIT  conversion from   source code to executable code or from an intermediate language to   executable code  Java  Visual Basic and  NET s Common Language Runtime    CLR  are examples of runtime engines    Read more     Unmanaged code is compiled to machine code and therefore executed by the OS directly  It therefore has the ability to do damaging powerful things Managed code does not  This is how everything used to work  so typically it s associated with old stuff like  dlls       An executable program that runs by itself  Launched from the operating   system  the program calls upon and uses the software routines in the   operating system  but does not require another software system to be   used  Assembly language programs that have been assembled into machine   language and C C   programs compiled into machine language for a   particular platform are examples of unmanaged code  Read more     Native code is often synonymous with Unmanaged  but is not identical

[c#] What is managed or unmanaged code in programming?

Examples related to c#

Examples related to .net

Examples related to unmanaged

Examples related to definition

Examples related to managed