Add editorconfig and analyzers

.editorconfig

@@ -0,0 +1,44 @@
+# EditorConfig is awesome: https://EditorConfig.org
+
+# See also Directory.Build.Props for additional analyzer settings
+
+root = true
+
+[*]
+# Enforce line endings to be LF
+end_of_line = lf
+# Enforce indentation to be 4 spaces
+indent_style = spaces
+indent_size = 4
+# Insert a final new line at the end of the file
+insert_final_newline = true
+
+[*.cs]
+
+# Style faults should be warnings
+dotnet_analyzer_diagnostic.category-Style.severity = warning
+
+# Enforce file scoped namespaces
+csharp_style_namespace_declarations = file_scoped:suggestion
+# Place 'using' directives outside of namespaces
+csharp_using_directive_placement = outside_namespace:true
+# Order 'using' directives with System.* appearing first
+dotnet_sort_system_directives_first = true
+# Suggest the use of var when the type is apparent
+csharp_style_var_for_built_in_types = true:suggestion
+csharp_style_var_when_type_is_apparent = true:suggestion
+csharp_style_var_elsewhere = true:suggestion
+# Suggest using expression bodies
+csharp_style_expression_bodied_methods = when_on_single_line
+dotnet_diagnostic.IDE0022.severity = suggestion
+# Don't mix non-braces and braces for ifs
+csharp_prefer_braces = when_multiline
+
+# "Expression body is never used"
+dotnet_diagnostic.IDE0058.severity = none
+# "'if' statement can be simplified"
+dotnet_diagnostic.IDE0046.severity = suggestion
+# "Do not declare static members on generic types"
+dotnet_diagnostic.CA1000.severity = none
+# "Instantiate argument exceptions correctly"
+dotnet_diagnostic.CA2208.severity = suggestion

.gitattributes

@@ -1,9 +1,7 @@
 ###############################################################################
 # Set default behavior to automatically normalize line endings.
 ###############################################################################
-* text=auto
-*.sh text eol=lf
-**/all-tests.js eol=lf
+* text eol=lf
 
 ###############################################################################
 # Set default behavior for command prompt diff.

Digdir.Domain.Dialogporten.sln

@@ -27,6 +27,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Digdir.Domain.Dialogporten.
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{33E486B1-3279-4645-B536-AB640D560C45}"
 	ProjectSection(SolutionItems) = preProject
+		.editorconfig = .editorconfig
+		Directory.Build.props = Directory.Build.props
 		docker-compose.yml = docker-compose.yml
 		README.md = README.md
 	EndProjectSection

Directory.Build.props

@@ -0,0 +1,20 @@
+<Project>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.CodeAnalysis.NetAnalyzers" Version="7.0.4" PrivateAssets="all" />
+  </ItemGroup>
+
+  <!--
+  <PropertyGroup Condition="'$(Configuration)'=='Release'">
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+  </PropertyGroup>
+  -->
+
+  <PropertyGroup>
+    <EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
+    <AnalysisMode>Recommended</AnalysisMode>
+    <EnableNETAnalyzers>true</EnableNETAnalyzers>
+    <AnalysisLevel>latest</AnalysisLevel>
+  </PropertyGroup>
+
+</Project>