Change nullability warnings to errors.

.editorconfig

@@ -96,6 +96,21 @@ dotnet_style_prefer_simplified_interpolation = true:suggestion
 # CA1822: Mark members as static
 dotnet_diagnostic.CA1822.severity = silent
 dotnet_style_namespace_match_folder = true:error
+dotnet_style_predefined_type_for_locals_parameters_members = true:silent
+dotnet_style_readonly_field = true:suggestion
+dotnet_code_quality_unused_parameters = all:suggestion
+dotnet_style_allow_statement_immediately_after_block_experimental = true:silent
+dotnet_style_allow_multiple_blank_lines_experimental = true:silent
+dotnet_style_require_accessibility_modifiers = for_non_interface_members:silent
+dotnet_style_predefined_type_for_member_access = true:silent
+dotnet_style_parentheses_in_other_operators = never_if_unnecessary:silent
+dotnet_style_parentheses_in_relational_binary_operators = always_for_clarity:silent
+dotnet_style_parentheses_in_other_binary_operators = always_for_clarity:silent
+dotnet_style_parentheses_in_arithmetic_binary_operators = always_for_clarity:silent
+dotnet_style_qualification_for_event = false:silent
+dotnet_style_qualification_for_method = false:silent
+dotnet_style_qualification_for_property = false:silent
+dotnet_style_qualification_for_field = false:silent
 [*.cs]
 csharp_indent_labels = one_less_than_current
 csharp_using_directive_placement = outside_namespace:silent
@@ -112,4 +127,43 @@ csharp_style_expression_bodied_indexers = true:silent
 csharp_style_expression_bodied_accessors = true:silent
 csharp_style_expression_bodied_lambdas = true:silent
 csharp_style_expression_bodied_local_functions = false:silent
-csharp_prefer_static_local_function = true:suggestion
+csharp_prefer_static_local_function = true:suggestion
+csharp_style_throw_expression = true:suggestion
+csharp_style_unused_value_expression_statement_preference = discard_variable:silent
+csharp_style_unused_value_assignment_preference = discard_variable:suggestion
+csharp_style_deconstructed_variable_declaration = true:suggestion
+csharp_style_inlined_variable_declaration = true:suggestion
+csharp_style_prefer_utf8_string_literals = true:suggestion
+csharp_style_prefer_tuple_swap = true:suggestion
+csharp_style_implicit_object_creation_when_type_is_apparent = true:suggestion
+csharp_style_prefer_range_operator = true:suggestion
+csharp_style_prefer_index_operator = true:suggestion
+csharp_style_prefer_local_over_anonymous_function = true:suggestion
+csharp_prefer_simple_default_expression = true:suggestion
+csharp_style_prefer_null_check_over_type_check = true:suggestion
+csharp_style_conditional_delegate_call = true:suggestion
+csharp_style_allow_blank_line_after_token_in_arrow_expression_clause_experimental = true:silent
+csharp_style_allow_blank_line_after_token_in_conditional_expression_experimental = true:silent
+csharp_style_allow_blank_line_after_colon_in_constructor_initializer_experimental = true:silent
+csharp_style_allow_blank_lines_between_consecutive_braces_experimental = true:silent
+csharp_style_allow_embedded_statements_on_same_line_experimental = true:silent
+csharp_style_prefer_readonly_struct_member = true:suggestion
+csharp_style_prefer_readonly_struct = true:suggestion
+csharp_style_prefer_pattern_matching = true:silent
+csharp_style_prefer_switch_expression = true:suggestion
+csharp_style_pattern_matching_over_is_with_cast_check = true:suggestion
+csharp_style_prefer_extended_property_pattern = true:suggestion
+csharp_style_prefer_not_pattern = true:suggestion
+csharp_style_pattern_matching_over_as_with_null_check = true:suggestion
+csharp_style_var_elsewhere = false:silent
+csharp_style_var_when_type_is_apparent = false:silent
+csharp_style_var_for_built_in_types = false:silent
+
+# CS8604: Possible null reference argument.
+dotnet_diagnostic.CS8604.severity = error
+
+# CS8600: Converting null literal or possible null value to non-nullable type.
+dotnet_diagnostic.CS8600.severity = error
+
+# CS8602: Dereference of a possibly null reference.
+dotnet_diagnostic.CS8602.severity = error

Agent.Installer.Win/Agent.Installer.Win.csproj

@@ -15,8 +15,8 @@
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
     <Deterministic>true</Deterministic>
     <TargetFrameworkProfile />
-	<LangVersion>10</LangVersion>
-	<Nullable>enable</Nullable>
+    <LangVersion>10</LangVersion>
+    <Nullable>enable</Nullable>
   </PropertyGroup>
   <PropertyGroup>
     <RuntimeIdentifiers>win;win-x64;win10-x64;win-x64;win10-x86;</RuntimeIdentifiers>

Agent.Installer.Win/ViewModels/MainWindowViewModel.cs

@@ -392,7 +392,7 @@ private async Task ExtractEmbeddedServerData()
                 return;
             }
 
-            var embeddedData = await _embeddedDataReader.TryGetEmbeddedData(filePath);
+            var embeddedData = await _embeddedDataReader.TryGetEmbeddedData(filePath!);
 
             if (embeddedData is null || embeddedData == EmbeddedServerData.Empty)
             {