Error with ExtentReports Flush and Razor

[alicemacdonald20]

I have receiving the below error when I run my test. It is complaining about the TearDown FlushReport function:

TearDown : System.TypeLoadException : Could not load type 'Microsoft.AspNetCore.Razor.Language.RazorTemplateEngine' from assembly 'Microsoft.AspNetCore.Razor.Language, Version=6.0.33.0

I understand it may be caused by incompatible package versions but I am new to coding and don’t know how I know what is or isn’t compatible?

These are my nuget package versions:

<PackageReference Include="ExtentReports" Version="4.1.0" />
<PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="8.0.8" />
<PackageReference Include="Microsoft.AspNetCore.Razor.Language" Version="6.0.33" />
<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.0" />
<PackageReference Include="Microsoft.Playwright.NUnit" Version="1.46.0" />
<PackageReference Include="Microsoft.Playwright.TestAdapter" Version="1.46.0" />
<PackageReference Include="NUnit" Version="4.1.0" />
<PackageReference Include="NUnit.Analyzers" Version="4.3.0">

And my code (ExtentReport.cs):

public static void InitialiseReport()
{
    string dir = AppDomain.CurrentDomain.BaseDirectory;
    string testReportPath = dir.Replace("bin\\Debug\\net8.0", "TestResults " + DateTime.Now.ToString("dd-MM-yyyy HH-mm-ss"));
    string reportName = "Test Report" + DateTime.Now.ToString("dd-MM-yyyy HH:mm:ss");

    ExtentHtmlReporter htmlReporter = new ExtentHtmlReporter(testReportPath);
    htmlReporter.Config.DocumentTitle = reportName;
    _extentReports = new ExtentReports();
    _extentReports.AttachReporter(htmlReporter);
}

public static void FlushReport()
{
    _extentReports.Flush();
}

And the test file TearDown that utilises this file, this is where the error is occurring:

 [TearDown]
 public void TearDown()
 {
     var status = TestContext.CurrentContext.Result.Outcome.Status;
     var stackTrace = TestContext.CurrentContext.Result.StackTrace;
     var errorMessage = TestContext.CurrentContext.Result.Message;

     switch(status)
     {
         case TestStatus.Failed:
             ExtentReport._test.Log(Status.Fail, "Test failed: " + errorMessage);
             ExtentReport._test.Log(Status.Fail, "Stack Trace: " + stackTrace);
             break;
         case TestStatus.Inconclusive:
             ExtentReport._test.Log(Status.Warning, "Test inconclusive");
             break;
         case TestStatus.Skipped:
             ExtentReport._test.Log(Status.Skip, "Test skipped");
             break;
         default:
             ExtentReport._test.Log(Status.Pass, "Test passed");
             break;
     }

     ExtentReport.FlushReport();
 }

 [OneTimeTearDown]
 public void OneTimeTearDown()
 {
     ExtentReport.FlushReport();
     _driver.Dispose();
 }

[Ashik224]

The RazorTemplateEngine class is not available from Microsoft.AspNetCore.Razor.Language version 3.1.0 and later versions, because it was removed in .NET Core 3.0. So, to make it compatible with ExtentReport, you need to use Microsoft.AspNetCore.Razor.Language version 2.2.0. It still contains the RazorTemplateEngine class.