1. calculate Rating as Double

2. set Optimise=true (Release build) as Benchmark guidelines
3. append Readkey so results viewable
4. make [some] methods static as analyzer suggestions
5. add .editorconfig file for contributor consistency

samples/core/Benchmarks/.editorconfig

@@ -0,0 +1,219 @@
+# Remove the line below if you want to inherit .editorconfig settings from higher directories
+root = true
+
+# C# files
+[*.cs]
+
+#### Core EditorConfig Options ####
+
+# Indentation and spacing
+indent_size = 4
+indent_style = space
+tab_width = 4
+
+# New line preferences
+end_of_line = crlf
+insert_final_newline = false
+
+#### .NET Coding Conventions ####
+
+# Organize usings
+dotnet_separate_import_directive_groups = false
+dotnet_sort_system_directives_first = true
+file_header_template = unset
+
+# this. and Me. preferences
+dotnet_style_qualification_for_event = false:suggestion
+dotnet_style_qualification_for_field = false:silent
+dotnet_style_qualification_for_method = false:suggestion
+dotnet_style_qualification_for_property = false:suggestion
+
+# Language keywords vs BCL types preferences
+dotnet_style_predefined_type_for_locals_parameters_members = true:suggestion
+dotnet_style_predefined_type_for_member_access = true:suggestion
+
+# Parentheses preferences
+dotnet_style_parentheses_in_arithmetic_binary_operators = always_for_clarity:silent
+dotnet_style_parentheses_in_other_binary_operators = always_for_clarity:silent
+dotnet_style_parentheses_in_other_operators = never_if_unnecessary:silent
+dotnet_style_parentheses_in_relational_binary_operators = always_for_clarity:silent
+
+# Modifier preferences
+dotnet_style_require_accessibility_modifiers = for_non_interface_members:silent
+
+# Expression-level preferences
+dotnet_style_coalesce_expression = true:suggestion
+dotnet_style_collection_initializer = true:suggestion
+dotnet_style_explicit_tuple_names = true:suggestion
+dotnet_style_null_propagation = true:suggestion
+dotnet_style_object_initializer = true:suggestion
+dotnet_style_operator_placement_when_wrapping = beginning_of_line
+dotnet_style_prefer_auto_properties = true:warning
+dotnet_style_prefer_compound_assignment = true:suggestion
+dotnet_style_prefer_conditional_expression_over_assignment = true:suggestion
+dotnet_style_prefer_conditional_expression_over_return = true:suggestion
+dotnet_style_prefer_inferred_anonymous_type_member_names = true:suggestion
+dotnet_style_prefer_inferred_tuple_names = true:suggestion
+dotnet_style_prefer_is_null_check_over_reference_equality_method = true:suggestion
+dotnet_style_prefer_simplified_boolean_expressions = true:suggestion
+dotnet_style_prefer_simplified_interpolation = true:suggestion
+
+# Field preferences
+dotnet_style_readonly_field = true:suggestion
+
+# Parameter preferences
+dotnet_code_quality_unused_parameters = all:suggestion
+
+# Suppression preferences
+dotnet_remove_unnecessary_suppression_exclusions = none
+
+#### C# Coding Conventions ####
+
+# var preferences
+csharp_style_var_elsewhere = true:suggestion
+csharp_style_var_for_built_in_types = true:suggestion
+csharp_style_var_when_type_is_apparent = true:suggestion
+
+# Expression-bodied members
+csharp_style_expression_bodied_accessors = when_on_single_line:suggestion
+csharp_style_expression_bodied_constructors = when_on_single_line:suggestion
+csharp_style_expression_bodied_indexers = when_on_single_line:suggestion
+csharp_style_expression_bodied_lambdas = when_on_single_line:suggestion
+csharp_style_expression_bodied_local_functions = when_on_single_line:suggestion
+csharp_style_expression_bodied_methods = when_on_single_line:suggestion
+csharp_style_expression_bodied_operators = when_on_single_line:suggestion
+csharp_style_expression_bodied_properties = when_on_single_line:suggestion
+
+# Pattern matching preferences
+csharp_style_pattern_matching_over_as_with_null_check = true:suggestion
+csharp_style_pattern_matching_over_is_with_cast_check = true:suggestion
+csharp_style_prefer_not_pattern = true:suggestion
+csharp_style_prefer_pattern_matching = true:silent
+csharp_style_prefer_switch_expression = true:suggestion
+
+# Null-checking preferences
+csharp_style_conditional_delegate_call = true:suggestion
+
+# Modifier preferences
+csharp_prefer_static_local_function = true:suggestion
+csharp_preferred_modifier_order = public,private,protected,internal,static,extern,new,virtual,abstract,sealed,override,readonly,unsafe,volatile,async:silent
+
+# Code-block preferences
+csharp_prefer_braces = when_multiline:suggestion
+csharp_prefer_simple_using_statement = false:suggestion
+
+# Expression-level preferences
+csharp_prefer_simple_default_expression = true:suggestion
+csharp_style_deconstructed_variable_declaration = false:suggestion
+csharp_style_inlined_variable_declaration = true:suggestion
+csharp_style_pattern_local_over_anonymous_function = true:suggestion
+csharp_style_prefer_index_operator = true:suggestion
+csharp_style_prefer_range_operator = true:suggestion
+csharp_style_throw_expression = true:suggestion
+csharp_style_unused_value_assignment_preference = discard_variable:suggestion
+csharp_style_unused_value_expression_statement_preference = discard_variable:silent
+
+# 'using' directive preferences
+csharp_using_directive_placement = outside_namespace:suggestion
+
+#### C# Formatting Rules ####
+
+# New line preferences
+csharp_new_line_before_catch = true
+csharp_new_line_before_else = true
+csharp_new_line_before_finally = true
+csharp_new_line_before_members_in_anonymous_types = true
+csharp_new_line_before_members_in_object_initializers = true
+csharp_new_line_before_open_brace = all
+csharp_new_line_between_query_expression_clauses = true
+
+# Indentation preferences
+csharp_indent_block_contents = true
+csharp_indent_braces = false
+csharp_indent_case_contents = true
+csharp_indent_case_contents_when_block = true
+csharp_indent_labels = one_less_than_current
+csharp_indent_switch_labels = true
+
+# Space preferences
+csharp_space_after_cast = false
+csharp_space_after_colon_in_inheritance_clause = true
+csharp_space_after_comma = true
+csharp_space_after_dot = false
+csharp_space_after_keywords_in_control_flow_statements = true
+csharp_space_after_semicolon_in_for_statement = true
+csharp_space_around_binary_operators = before_and_after
+csharp_space_around_declaration_statements = false
+csharp_space_before_colon_in_inheritance_clause = true
+csharp_space_before_comma = false
+csharp_space_before_dot = false
+csharp_space_before_open_square_brackets = false
+csharp_space_before_semicolon_in_for_statement = false
+csharp_space_between_empty_square_brackets = false
+csharp_space_between_method_call_empty_parameter_list_parentheses = false
+csharp_space_between_method_call_name_and_opening_parenthesis = false
+csharp_space_between_method_call_parameter_list_parentheses = false
+csharp_space_between_method_declaration_empty_parameter_list_parentheses = false
+csharp_space_between_method_declaration_name_and_open_parenthesis = false
+csharp_space_between_method_declaration_parameter_list_parentheses = false
+csharp_space_between_parentheses = false
+csharp_space_between_square_brackets = false
+
+# Wrapping preferences
+csharp_preserve_single_line_blocks = true
+csharp_preserve_single_line_statements = true
+
+#### Naming styles ####
+
+# Naming rules
+
+dotnet_naming_rule.interface_should_be_begins_with_i.severity = suggestion
+dotnet_naming_rule.interface_should_be_begins_with_i.symbols = interface
+dotnet_naming_rule.interface_should_be_begins_with_i.style = begins_with_i
+
+dotnet_naming_rule.types_should_be_pascal_case.severity = suggestion
+dotnet_naming_rule.types_should_be_pascal_case.symbols = types
+dotnet_naming_rule.types_should_be_pascal_case.style = pascal_case
+
+dotnet_naming_rule.non_field_members_should_be_pascal_case.severity = suggestion
+dotnet_naming_rule.non_field_members_should_be_pascal_case.symbols = non_field_members
+dotnet_naming_rule.non_field_members_should_be_pascal_case.style = pascal_case
+
+dotnet_naming_rule.private_or_internal_field_should_be_underscore_prefix.severity = silent
+dotnet_naming_rule.private_or_internal_field_should_be_underscore_prefix.symbols = private_or_internal_field
+dotnet_naming_rule.private_or_internal_field_should_be_underscore_prefix.style = underscore_prefix
+
+# Symbol specifications
+
+dotnet_naming_symbols.interface.applicable_kinds = interface
+dotnet_naming_symbols.interface.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
+dotnet_naming_symbols.interface.required_modifiers = 
+
+dotnet_naming_symbols.private_or_internal_field.applicable_kinds = field
+dotnet_naming_symbols.private_or_internal_field.applicable_accessibilities = internal, private, private_protected
+dotnet_naming_symbols.private_or_internal_field.required_modifiers = 
+
+dotnet_naming_symbols.types.applicable_kinds = class, struct, interface, enum
+dotnet_naming_symbols.types.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
+dotnet_naming_symbols.types.required_modifiers = 
+
+dotnet_naming_symbols.non_field_members.applicable_kinds = property, event, method
+dotnet_naming_symbols.non_field_members.applicable_accessibilities = public, internal, private, protected, protected_internal, private_protected
+dotnet_naming_symbols.non_field_members.required_modifiers = 
+
+# Naming styles
+
+dotnet_naming_style.pascal_case.required_prefix = 
+dotnet_naming_style.pascal_case.required_suffix = 
+dotnet_naming_style.pascal_case.word_separator = 
+dotnet_naming_style.pascal_case.capitalization = pascal_case
+
+dotnet_naming_style.begins_with_i.required_prefix = I
+dotnet_naming_style.begins_with_i.required_suffix = 
+dotnet_naming_style.begins_with_i.word_separator = 
+dotnet_naming_style.begins_with_i.capitalization = pascal_case
+
+dotnet_naming_style.underscore_prefix.required_prefix = _
+dotnet_naming_style.underscore_prefix.required_suffix = 
+dotnet_naming_style.underscore_prefix.word_separator = 
+dotnet_naming_style.underscore_prefix.capitalization = camel_case

samples/core/Benchmarks/AverageBlogRanking.cs

@@ -9,12 +9,12 @@
 namespace Benchmarks
 {
     [MemoryDiagnoser]
-    public class AverageBlogRanking
+    public static class AverageBlogRanking
     {
         public const int NumBlogs = 1000;
 
         [GlobalSetup]
-        public void Setup()
+        public static void Setup()
         {
             using var context = new BloggingContext();
             context.Database.EnsureDeleted();
@@ -24,7 +24,7 @@ public void Setup()
 
         #region LoadEntities
         [Benchmark]
-        public double LoadEntities()
+        public static double LoadEntities()
         {
             var sum = 0;
             var count = 0;
@@ -35,13 +35,13 @@ public double LoadEntities()
                 count++;
             }
 
-            return sum / count;
+            return (double)sum / count;
         }
         #endregion
 
         #region LoadEntitiesNoTracking
         [Benchmark]
-        public double LoadEntitiesNoTracking()
+        public static double LoadEntitiesNoTracking()
         {
             var sum = 0;
             var count = 0;
@@ -52,13 +52,13 @@ public double LoadEntitiesNoTracking()
                 count++;
             }
 
-            return sum / count;
+            return (double)sum / count;
         }
         #endregion
 
         #region ProjectOnlyRanking
         [Benchmark]
-        public double ProjectOnlyRanking()
+        public static double ProjectOnlyRanking()
         {
             var sum = 0;
             var count = 0;
@@ -69,13 +69,13 @@ public double ProjectOnlyRanking()
                 count++;
             }
 
-            return sum / count;
+            return (double)sum / count;
         }
         #endregion
 
         #region CalculateInDatabase
         [Benchmark(Baseline = true)]
-        public double CalculateInDatabase()
+        public static double CalculateInDatabase()
         {
             using var ctx = new BloggingContext();
             return ctx.Blogs.Average(b => b.Rating);

samples/core/Benchmarks/Benchmarks.csproj

@@ -1,12 +1,13 @@
-<Project Sdk="Microsoft.NET.Sdk">
-  <PropertyGroup>
-    <OutputType>Exe</OutputType>
-    <TargetFramework>net5.0</TargetFramework>
-  </PropertyGroup>
+<Project Sdk="Microsoft.NET.Sdk">
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net5.0</TargetFramework>
+        <Optimize>true</Optimize>
+    </PropertyGroup>
 
-  <ItemGroup>
-    <PackageReference Include="BenchmarkDotNet" Version="0.12.1" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="5.0.0" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Proxies" Version="5.0.0" />
-  </ItemGroup>
+    <ItemGroup>
+        <PackageReference Include="BenchmarkDotNet" Version="0.12.1" />
+        <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="5.0.1" />
+        <PackageReference Include="Microsoft.EntityFrameworkCore.Proxies" Version="5.0.1" />
+    </ItemGroup>
 </Project>

samples/core/Benchmarks/DynamicallyConstructedQueries.cs

@@ -17,7 +17,7 @@ public class DynamicallyConstructedQueries
         private int _blogNumber;
 
         [GlobalSetup]
-        public void GlobalSetup()
+        public static void GlobalSetup()
         {
             using var context = new BloggingContext();
             context.Database.EnsureDeleted();
@@ -30,7 +30,7 @@ public int WithConstant()
         {
             return GetBlogCount("blog" + Interlocked.Increment(ref _blogNumber));
 
-            int GetBlogCount(string url)
+            static int GetBlogCount(string url)
             {
                 using var context = new BloggingContext();
 

samples/core/Benchmarks/Inheritance.cs

@@ -15,7 +15,7 @@ public class Inheritance
         [Params(5000)]
         public int RowsPerEntityType { get; set; }
 
-        [GlobalSetup(Target=nameof(TPH))]
+        [GlobalSetup(Target = nameof(TPH))]
         public void SetupTPH()
         {
             Console.WriteLine("Setting up database...");
@@ -26,7 +26,7 @@ public void SetupTPH()
             Console.WriteLine("Setup complete.");
         }
 
-        [GlobalSetup(Target=nameof(TPT))]
+        [GlobalSetup(Target = nameof(TPT))]
         public void SetupTPT()
         {
             Console.WriteLine("Setting up database...");
@@ -38,15 +38,15 @@ public void SetupTPT()
         }
 
         [Benchmark]
-        public List<Root> TPH()
+        public static List<Root> TPH()
         {
             using var context = new TPHContext();
 
             return context.Roots.ToList();
         }
 
         [Benchmark]
-        public List<Root> TPT()
+        public static List<Root> TPT()
         {
             using var context = new TPTContext();
 

samples/core/Benchmarks/Program.cs

@@ -5,6 +5,10 @@ namespace Benchmarks
     public class Program
     {
         public static void Main(string[] args)
-            => BenchmarkSwitcher.FromAssembly(typeof(Program).Assembly).Run(args);
+        {
+            BenchmarkSwitcher.FromAssembly(typeof(Program).Assembly).Run(args);
+            System.Console.WriteLine("all done, type any key to exit [after keeping above log!]");
+            System.Console.ReadKey();
+        }
     }
 }