diff --git a/.editorconfig b/.editorconfig
index ad25438..b092e58 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -127,6 +127,8 @@ csharp_space_between_method_call_empty_parameter_list_parentheses = false
 csharp_preserve_single_line_statements = true
 csharp_preserve_single_line_blocks = true
 csharp_style_namespace_declarations = file_scoped
+# Do not suggest primary constructor
+dotnet_diagnostic.IDE0290.severity = none
 
 ###############################
 # VB Coding Conventions       #
diff --git a/Calendare.VSyntaxReader.sln b/Calendare.VSyntaxReader.sln
deleted file mode 100644
index 9aed9f7..0000000
--- a/Calendare.VSyntaxReader.sln
+++ /dev/null
@@ -1,34 +0,0 @@
-
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 17
-VisualStudioVersion = 17.0.31903.59
-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "VSyntaxReader.Examples", "VSyntaxReader.Examples\VSyntaxReader.Examples.csproj", "{176265F3-B879-4B62-B38D-3A1A338753AB}"
-EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "VSyntaxReader", "VSyntaxReader\VSyntaxReader.csproj", "{7DCA2674-89AE-40B1-A330-44FC3ACA15BE}"
-EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "VSyntaxReader.Tests", "VSyntaxReader.Tests\VSyntaxReader.Tests.csproj", "{B1F4BCEA-1FDE-4DA8-B27E-44253B4F37C2}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Any CPU = Debug|Any CPU
-		Release|Any CPU = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{176265F3-B879-4B62-B38D-3A1A338753AB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{176265F3-B879-4B62-B38D-3A1A338753AB}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{176265F3-B879-4B62-B38D-3A1A338753AB}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{176265F3-B879-4B62-B38D-3A1A338753AB}.Release|Any CPU.Build.0 = Release|Any CPU
-		{7DCA2674-89AE-40B1-A330-44FC3ACA15BE}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{7DCA2674-89AE-40B1-A330-44FC3ACA15BE}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{7DCA2674-89AE-40B1-A330-44FC3ACA15BE}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{7DCA2674-89AE-40B1-A330-44FC3ACA15BE}.Release|Any CPU.Build.0 = Release|Any CPU
-		{B1F4BCEA-1FDE-4DA8-B27E-44253B4F37C2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{B1F4BCEA-1FDE-4DA8-B27E-44253B4F37C2}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{B1F4BCEA-1FDE-4DA8-B27E-44253B4F37C2}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{B1F4BCEA-1FDE-4DA8-B27E-44253B4F37C2}.Release|Any CPU.Build.0 = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-EndGlobal
diff --git a/Calendare.VSyntaxReader.slnx b/Calendare.VSyntaxReader.slnx
new file mode 100644
index 0000000..807c84b
--- /dev/null
+++ b/Calendare.VSyntaxReader.slnx
@@ -0,0 +1,5 @@
+<Solution>
+  <Project Path="VSyntaxReader.Examples/VSyntaxReader.Examples.csproj" />
+  <Project Path="VSyntaxReader.Tests/VSyntaxReader.Tests.csproj" />
+  <Project Path="VSyntaxReader/VSyntaxReader.csproj" />
+</Solution>
diff --git a/VSyntaxReader/Properties/DateTimeProperty.cs b/VSyntaxReader/Properties/DateTimeProperty.cs
index be1bd15..44b1969 100644
--- a/VSyntaxReader/Properties/DateTimeProperty.cs
+++ b/VSyntaxReader/Properties/DateTimeProperty.cs
@@ -81,7 +81,7 @@ public DeserializeResult Deserialize(ICalendarComponent calendarComponent)
 
     public string Serialize()
     {
-        return DateTimePropertyHelper.Serialize(Raw, DataType, DefaultDataType, [Value], IsValid);
+        return DateTimePropertyHelper.Serialize(Raw, DataType, DefaultDataType, Value is not null ? [Value] : [], IsValid);
     }
 
     public IProperty DeepClone() => Copy();
diff --git a/VSyntaxReader/Properties/FreeBusyProperty.cs b/VSyntaxReader/Properties/FreeBusyProperty.cs
index 4fb84d6..938ee6f 100644
--- a/VSyntaxReader/Properties/FreeBusyProperty.cs
+++ b/VSyntaxReader/Properties/FreeBusyProperty.cs
@@ -33,7 +33,7 @@ public FreeBusyProperty(CalendarObject calendarObject)
     public DeserializeResult Deserialize(ICalendarComponent calendarComponent)
     {
         Value = new CaldavFreeBusy();
-        List<string> values = [Raw.Value];
+        List<string> values = [];
         if (Raw.Value is not null)
         {
             values = [.. Raw.Value.Split(',')];
diff --git a/VSyntaxReader/Properties/RecurrenceDateProperty.cs b/VSyntaxReader/Properties/RecurrenceDateProperty.cs
index b87ab4c..6f21370 100644
--- a/VSyntaxReader/Properties/RecurrenceDateProperty.cs
+++ b/VSyntaxReader/Properties/RecurrenceDateProperty.cs
@@ -87,7 +87,7 @@ public DeserializeResult Deserialize(ICalendarComponent calendarComponent)
             return hasValidTimezone;
         }
 
-        List<string> values = [Raw.Value];
+        List<string> values = [];
         var deserializeResult = new DeserializeResult(true);
         if (Raw.Value is not null)
         {