diff --git a/Personnummer.sln b/Personnummer.sln
deleted file mode 100644
index b376e78..0000000
--- a/Personnummer.sln
+++ /dev/null
@@ -1,40 +0,0 @@
-
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 15
-VisualStudioVersion = 15.0.27004.2002
-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Personnummer", "Personnummer\Personnummer.csproj", "{333590CE-E81E-445A-99CD-5974B712E58E}"
-EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Personnummer.Tests", "Personnummer.Tests\Personnummer.Tests.csproj", "{20EB30ED-D53E-4284-824D-6C0A28290F8B}"
-EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Misc", "Misc", "{69F4DA36-7866-4FE5-9ADC-3C5FFE2227DD}"
-	ProjectSection(SolutionItems) = preProject
-		.github\renovate.json = .github\renovate.json
-		.github\workflows\codeql-analysis.yml = .github\workflows\codeql-analysis.yml
-		.github\workflows\csharp.yml = .github\workflows\csharp.yml
-		.github\workflows\release.yml = .github\workflows\release.yml
-		Readme.md = Readme.md
-	EndProjectSection
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Any CPU = Debug|Any CPU
-		Release|Any CPU = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{333590CE-E81E-445A-99CD-5974B712E58E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{333590CE-E81E-445A-99CD-5974B712E58E}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{333590CE-E81E-445A-99CD-5974B712E58E}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{333590CE-E81E-445A-99CD-5974B712E58E}.Release|Any CPU.Build.0 = Release|Any CPU
-		{20EB30ED-D53E-4284-824D-6C0A28290F8B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{20EB30ED-D53E-4284-824D-6C0A28290F8B}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{20EB30ED-D53E-4284-824D-6C0A28290F8B}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{20EB30ED-D53E-4284-824D-6C0A28290F8B}.Release|Any CPU.Build.0 = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-	GlobalSection(ExtensibilityGlobals) = postSolution
-		SolutionGuid = {2011341B-7C40-459D-B97C-1387F390489D}
-	EndGlobalSection
-EndGlobal
diff --git a/Personnummer.slnx b/Personnummer.slnx
new file mode 100644
index 0000000..21e72ba
--- /dev/null
+++ b/Personnummer.slnx
@@ -0,0 +1,11 @@
+<Solution>
+  <Folder Name="/Misc/">
+    <File Path=".github/renovate.json" />
+    <File Path=".github/workflows/codeql-analysis.yml" />
+    <File Path=".github/workflows/csharp.yml" />
+    <File Path=".github/workflows/release.yml" />
+    <File Path="Readme.md" />
+  </Folder>
+  <Project Path="Personnummer.Tests/Personnummer.Tests.csproj" />
+  <Project Path="Personnummer/Personnummer.csproj" />
+</Solution>