How do I programmatically get the GUID of an application in NET 2 0

Question

I need to access the assembly of my project in C   NET 2 0  I can see the GUID in the  Assembly Information  dialog in under project properties  and at the moment I have just copied it to a const in the code  The GUID will never change  so this is not that bad of a solution  but it would be nice to access it directly  Is there a way to do this

User · Accepted Answer

Try the following code   The value you are looking for is stored on a GuidAttribute instance attached to the Assembly  using System Runtime InteropServices   static void Main string   args        var assembly   typeof Program  Assembly      var attribute    GuidAttribute assembly GetCustomAttributes typeof GuidAttribute  true  0       var id   attribute Value      Console WriteLine id

User · Answer

Or  just as easy  string assyGuid   Assembly GetExecutingAssembly   GetCustomAttribute lt GuidAttribute gt    Value ToUpper     It works for me

User · Answer

Another way is to use Marshal GetTypeLibGuidForAssembly  According to MSDN   When assemblies are exported to type libraries  the type library is assigned a LIBID  You can set the LIBID explicitly by applying the System Runtime InteropServices GuidAttribute at the assembly level  or it can be generated automatically  The Tlbimp exe  Type Library Importer  tool calculates a LIBID value based on the identity of the assembly  GetTypeLibGuid returns the LIBID that is associated with the GuidAttribute  if the attribute is applied  Otherwise  GetTypeLibGuidForAssembly returns the calculated value  Alternatively  you can use the GetTypeLibGuid method to extract the actual LIBID from an existing type library

User · Answer

You should be able to read the GUID attribute of the assembly via reflection  This will get the GUID for the current assembly Assembly asm   Assembly GetExecutingAssembly    var attribs    asm GetCustomAttributes typeof GuidAttribute   true    Console WriteLine  attribs 0  as GuidAttribute  Value    You can replace the GuidAttribute with other attributes as well  if you want to read things like AssemblyTitle  AssemblyVersion  etc  You can also load another assembly  Assembly LoadFrom and all  instead of getting the current assembly - if you need to read these attributes of external assemblies  for example  when loading a plugin

User · Answer

To get the appID you could use the following line of code   var applicationId     GuidAttribute typeof Program  Assembly GetCustomAttributes typeof GuidAttribute   true  0   Value    For this you need to include the System Runtime InteropServices

User · Answer

You should be able to read the GUID attribute of the assembly via reflection  This will get the GUID for the current assembly Assembly asm   Assembly GetExecutingAssembly    var attribs    asm GetCustomAttributes typeof GuidAttribute   true    Console WriteLine  attribs 0  as GuidAttribute  Value    You can replace the GuidAttribute with other attributes as well  if you want to read things like AssemblyTitle  AssemblyVersion  etc  You can also load another assembly  Assembly LoadFrom and all  instead of getting the current assembly - if you need to read these attributes of external assemblies  for example  when loading a plugin

User · Answer

To get the appID you could use the following line of code   var applicationId     GuidAttribute typeof Program  Assembly GetCustomAttributes typeof GuidAttribute   true  0   Value    For this you need to include the System Runtime InteropServices

User · Answer

You should be able to read the GUID attribute of the assembly via reflection  This will get the GUID for the current assembly Assembly asm   Assembly GetExecutingAssembly    var attribs    asm GetCustomAttributes typeof GuidAttribute   true    Console WriteLine  attribs 0  as GuidAttribute  Value    You can replace the GuidAttribute with other attributes as well  if you want to read things like AssemblyTitle  AssemblyVersion  etc  You can also load another assembly  Assembly LoadFrom and all  instead of getting the current assembly - if you need to read these attributes of external assemblies  for example  when loading a plugin

User · Answer

For an out-of-the-box working example  this is what I ended up using based on the previous answers  using System Reflection  using System Runtime InteropServices   label1 Text    quot GUID   quot      GuidAttribute Attribute GetCustomAttribute Assembly GetExecutingAssembly    typeof GuidAttribute   false   Value ToUpper     Alternatively  this way allows you to use it from a static class           lt summary gt          public GUID property for use in static class  lt  summary gt           lt returns gt          Returns the application GUID or  quot  quot  if unable to get it   lt  returns gt      static public string AssemblyGuid               get                       object   attributes   Assembly GetEntryAssembly   GetCustomAttributes typeof GuidAttribute   false               if  attributes Length    0    return String Empty                return   System Runtime InteropServices GuidAttribute attributes 0   Value ToUpper

User · Answer

Or  just as easy  string assyGuid   Assembly GetExecutingAssembly   GetCustomAttribute lt GuidAttribute gt    Value ToUpper     It works for me

User · Answer

string AssemblyID   Assembly GetEntryAssembly   GetCustomAttribute lt GuidAttribute gt    Value   or  VB NET    Dim AssemblyID As String   Assembly GetEntryAssembly GetCustomAttribute Of GuidAttribute  Value

User · Answer

You should be able to read the GUID attribute of the assembly via reflection  This will get the GUID for the current assembly Assembly asm   Assembly GetExecutingAssembly    var attribs    asm GetCustomAttributes typeof GuidAttribute   true    Console WriteLine  attribs 0  as GuidAttribute  Value    You can replace the GuidAttribute with other attributes as well  if you want to read things like AssemblyTitle  AssemblyVersion  etc  You can also load another assembly  Assembly LoadFrom and all  instead of getting the current assembly - if you need to read these attributes of external assemblies  for example  when loading a plugin

User · Answer

Another way is to use Marshal GetTypeLibGuidForAssembly  According to MSDN   When assemblies are exported to type libraries  the type library is assigned a LIBID  You can set the LIBID explicitly by applying the System Runtime InteropServices GuidAttribute at the assembly level  or it can be generated automatically  The Tlbimp exe  Type Library Importer  tool calculates a LIBID value based on the identity of the assembly  GetTypeLibGuid returns the LIBID that is associated with the GuidAttribute  if the attribute is applied  Otherwise  GetTypeLibGuidForAssembly returns the calculated value  Alternatively  you can use the GetTypeLibGuid method to extract the actual LIBID from an existing type library

User · Answer

There wasn t any luck here with the other answers  but I managed to work it out with this nice one-liner    GuidAttribute  AppDomain CurrentDomain DomainManager EntryAssembly  GetCustomAttributes typeof GuidAttribute   true  0   Value

User · Answer

For an out-of-the-box working example  this is what I ended up using based on the previous answers  using System Reflection  using System Runtime InteropServices   label1 Text    quot GUID   quot      GuidAttribute Attribute GetCustomAttribute Assembly GetExecutingAssembly    typeof GuidAttribute   false   Value ToUpper     Alternatively  this way allows you to use it from a static class           lt summary gt          public GUID property for use in static class  lt  summary gt           lt returns gt          Returns the application GUID or  quot  quot  if unable to get it   lt  returns gt      static public string AssemblyGuid               get                       object   attributes   Assembly GetEntryAssembly   GetCustomAttributes typeof GuidAttribute   false               if  attributes Length    0    return String Empty                return   System Runtime InteropServices GuidAttribute attributes 0   Value ToUpper

User · Answer

There wasn t any luck here with the other answers  but I managed to work it out with this nice one-liner    GuidAttribute  AppDomain CurrentDomain DomainManager EntryAssembly  GetCustomAttributes typeof GuidAttribute   true  0   Value

User · Answer

string AssemblyID   Assembly GetEntryAssembly   GetCustomAttribute lt GuidAttribute gt    Value   or  VB NET    Dim AssemblyID As String   Assembly GetEntryAssembly GetCustomAttribute Of GuidAttribute  Value

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