Links

Enable additional rules

Those rules are enabled by default.
Edit the project file to enable additional rules:

MyProject.csproj

<PropertyGroup>
  <!-- ... -->
  <AnalysisLevel>latest-recommended</AnalysisLevel>
</PropertyGroup>

Editorconfig

Core options

.editorconfig

###############################
# Core EditorConfig Options   #
###############################
root = true

# All files
[*]
indent_style         = space
insert_final_newline = true
charset              = utf-8

# XML project files
[*.csproj]
indent_size = 2

# JSON config files
[*.json]
indent_size = 2

# C# code files
[*.cs]
indent_size              = 4
trim_trailing_whitespace = true

# set the rules severity to warning
dotnet_analyzer_diagnostic.severity = warning

Style configuration

.editorconfig

###############################
# Style configuration         #
###############################
# IDE0160 / IDE0161: Namespace declaration preferences
csharp_style_namespace_declarations = file_scoped : error

Disable rules

.editorconfig

###############################
# Disabled rules              #
###############################
# lower speller rule severity to suggestion
dotnet_diagnostic.VSSpell001.severity = suggestion
dotnet_diagnostic.VSSpell002.severity = suggestion

# IDE0046: Use conditional expression for return
dotnet_diagnostic.IDE0046.severity = suggestion

# IDE0058: Remove unnecessary expression value
dotnet_diagnostic.IDE0058.severity = none

# CA1305: Specify IFormatProvider
dotnet_diagnostic.CA1305.severity = none

# CA1310: Specify StringComparison for correctness
dotnet_diagnostic.CA1310.severity = none

# Specify CultureInfo
dotnet_diagnostic.CA1304.severity = suggestion
# Specify a culture
dotnet_diagnostic.CA1311.severity = suggestion