use new solution file format

Oqtane.Maui.sln

@@ -1,26 +0,0 @@
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 17
-VisualStudioVersion = 17.0.31611.283
-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Oqtane.Maui", "Oqtane.Maui\Oqtane.Maui.csproj", "{5EE64148-2152-4908-A3E7-658EB1D87754}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Any CPU = Debug|Any CPU
-		Release|Any CPU = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{5EE64148-2152-4908-A3E7-658EB1D87754}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{5EE64148-2152-4908-A3E7-658EB1D87754}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{5EE64148-2152-4908-A3E7-658EB1D87754}.Debug|Any CPU.Deploy.0 = Debug|Any CPU
-		{5EE64148-2152-4908-A3E7-658EB1D87754}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{5EE64148-2152-4908-A3E7-658EB1D87754}.Release|Any CPU.Build.0 = Release|Any CPU
-		{5EE64148-2152-4908-A3E7-658EB1D87754}.Release|Any CPU.Deploy.0 = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-	GlobalSection(ExtensibilityGlobals) = postSolution
-		SolutionGuid = {61F7FB11-1E47-470C-91E2-47F8143E1572}
-	EndGlobalSection
-EndGlobal

Oqtane.Maui.slnx

@@ -0,0 +1,3 @@
+<Solution>
+  <Project Path="Oqtane.Maui\Oqtane.Maui.csproj" DefaultStartup="true" />
+</Solution>

Oqtane.Updater.sln

@@ -1,38 +0,0 @@
-
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 16.0.28822.285
-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{77EECA8C-B58E-469E-B8C5-D543AFC9A654}"
-	ProjectSection(SolutionItems) = preProject
-		.editorconfig = .editorconfig
-		.gitignore = .gitignore
-		README.md = README.md
-	EndProjectSection
-EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Oqtane.Updater", "Oqtane.Updater\Oqtane.Updater.csproj", "{2E8C6889-37CF-4C8D-88B1-505547F25098}"
-EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Oqtane.Shared", "Oqtane.Shared\Oqtane.Shared.csproj", "{E2512C17-291F-460A-A6D1-741C301DA184}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Any CPU = Debug|Any CPU
-		Release|Any CPU = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{2E8C6889-37CF-4C8D-88B1-505547F25098}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{2E8C6889-37CF-4C8D-88B1-505547F25098}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{2E8C6889-37CF-4C8D-88B1-505547F25098}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{2E8C6889-37CF-4C8D-88B1-505547F25098}.Release|Any CPU.Build.0 = Release|Any CPU
-		{E2512C17-291F-460A-A6D1-741C301DA184}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{E2512C17-291F-460A-A6D1-741C301DA184}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{E2512C17-291F-460A-A6D1-741C301DA184}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{E2512C17-291F-460A-A6D1-741C301DA184}.Release|Any CPU.Build.0 = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-	GlobalSection(ExtensibilityGlobals) = postSolution
-		SolutionGuid = {1FB11796-35DE-4AED-9A52-17733557FCC4}
-	EndGlobalSection
-EndGlobal

Oqtane.Updater.slnx

@@ -0,0 +1,3 @@
+<Solution>
+  <Project Path="Oqtane.Updater\Oqtane.Updater.csproj" DefaultStartup="true" />
+</Solution>

Oqtane.slnx

@@ -1,5 +1,5 @@
 <Solution>
-  <Project DefaultStartup="true" Path="Oqtane.Server\Oqtane.Server.csproj" />
+  <Project Path="Oqtane.Server\Oqtane.Server.csproj" DefaultStartup="true" />
   <Project Path="Oqtane.Client\Oqtane.Client.csproj" />
   <Project Path="Oqtane.Shared\Oqtane.Shared.csproj" />
 </Solution>