Merge pull request #196 from DuendeSoftware/dgb/update-editorconfig-20250426161313

Update .editorconfig

Author: adamralph

.editorconfig

@@ -21,7 +21,7 @@ csharp_style_var_elsewhere = true
 csharp_style_var_for_built_in_types = true
 csharp_style_var_when_type_is_apparent = true
 dotnet_diagnostic.IDE0003.severity = error # Remove this or Me qualification
-dotnet_diagnostic.IDE0005.severity = warning # Remove unnecessary using directives
+dotnet_diagnostic.IDE0005.severity = error # Remove unnecessary using directives
 dotnet_diagnostic.IDE0007.severity = error # Use var instead of explicit type
 dotnet_diagnostic.IDE0021.severity = error # Use expression body for constructors
 dotnet_diagnostic.IDE0022.severity = error # Use expression body for methods
@@ -31,9 +31,9 @@ dotnet_diagnostic.IDE0025.severity = error # Use expression body for properties
 dotnet_diagnostic.IDE0026.severity = error # Use expression body for indexers
 dotnet_diagnostic.IDE0027.severity = error # Use expression body for accessors
 dotnet_diagnostic.IDE0049.severity = error # Use language keywords instead of framework type names for type references 
-dotnet_diagnostic.IDE0055.severity = warning # Formatting rule
+dotnet_diagnostic.IDE0055.severity = error # Formatting rule
 dotnet_diagnostic.IDE0066.severity = error # Use switch expressions
-dotnet_diagnostic.IDE0073.severity = warning # Require file header
+dotnet_diagnostic.IDE0073.severity = error # Require file header
 dotnet_diagnostic.IDE0161.severity = error # Use file-scoped namespace
 dotnet_sort_system_directives_first = true
 dotnet_style_predefined_type_for_locals_parameters_members = true