GetTestSuitesForPlanAsync not working correctly

Question

Working with Azure DevOps board automation.
GetTestSuitesForPlanAsync/GetTestSuiteById.. - methods that are created to get data for suits. But after sending dequest I got "Runtime instantiation of this attribute is not allowed".
Plan id is correct.
Project name is correct too.
Microsoft.VisualStudio.Services.TestManagement.TestPlanning.WebApi.SuiteExpand.None/Children/null - anything.

So could you tell me what is wrong please ?

Answer 1

Hi @Nazar Demchyk ,

Welcome to the Microsoft Q&A Platform! Thank you for asking your question here.

The error "Runtime instantiation of this attribute is not allowed" is a specific .NET runtime error. It typically occurs when an application running on .NET Core (or .NET 5/6/7/8) references a library built for .NET Framework that utilizes deprecated Code Access Security (CAS) attributes.

Potential Causes & Solutions:

• Package Version Mismatch: Ensure all your Azure DevOps related NuGet packages (e.g., Microsoft.TeamFoundationServer.Client, Microsoft.VisualStudio.Services.Client, Microsoft.VisualStudio.Services.TestManagement.TestPlanning.WebApi) are on the same version. Mixing versions can cause the loader to pull in an incorrect assembly target (e.g., a .NET Framework DLL instead of a .NET Standard one).
  • Action: Update all Microsoft.VisualStudio.Services.* and Microsoft.TeamFoundationServer.* packages to the latest stable version.
• Check the method signature in the assembly/package you referenced
  • Verify with Intellisense or reflect on GetTestSuitesForPlanAsync to see whether the expand parameter type is Nullable<int> or Nullable<SuiteExpand>. If it’s SuiteExpand?, pass a SuiteExpand?. If its int?, cast the enum to int?.
  • Obsolete - TestCompatHttpClientBase.GetTestSuitesForPlanAsync Method
  • Current - TestPlanHttpClientBase.GetTestSuitesForPlanAsync Method

Please let me know if above helps in comments.