Add linting rule (#472)

* remove unused package

* fix format issue

* enforce format check

Author: zhiyuanliang-ms

.editorconfig

@@ -0,0 +1,39 @@
+# editorconfig.org
+
+# top-most EditorConfig file
+root = true
+
+## Default settings ##
+[*]
+insert_final_newline = true
+indent_style = space
+indent_size = 4
+trim_trailing_whitespace = true
+
+## Formatting rule ##
+# https://learn.microsoft.com/dotnet/fundamentals/code-analysis/style-rules/ide0055
+dotnet_diagnostic.IDE0055.severity = error
+
+# 'Using' directive preferences
+dotnet_sort_system_directives_first = false
+
+# New line preferences
+dotnet_diagnostic.IDE2002.severity = error
+csharp_style_allow_blank_lines_between_consecutive_braces_experimental = false
+dotnet_diagnostic.IDE2004.severity = error
+csharp_style_allow_blank_line_after_colon_in_constructor_initializer_experimental = false
+dotnet_diagnostic.IDE2005.severity = error
+csharp_style_allow_blank_line_after_token_in_conditional_expression_experimental = false
+dotnet_diagnostic.IDE2006.severity = error
+csharp_style_allow_blank_line_after_token_in_arrow_expression_clause_experimental = false
+dotnet_diagnostic.IDE2000.severity = error
+dotnet_style_allow_multiple_blank_lines_experimental = false
+dotnet_diagnostic.IDE2003.severity = error
+dotnet_style_allow_statement_immediately_after_block_experimental = false
+
+[*.csproj]
+indent_size = 2
+charset = utf-8
+
+[*.json]
+indent_size = 2

examples/BlazorServerApp/BlazorServerApp.csproj

@@ -9,4 +9,8 @@
     <ProjectReference Include="..\..\src\Microsoft.FeatureManagement\Microsoft.FeatureManagement.csproj" />
   </ItemGroup>
 
+  <PropertyGroup>
+    <EnforceCodeStyleInBuild>True</EnforceCodeStyleInBuild>
+  </PropertyGroup>
+
 </Project>

examples/BlazorServerApp/BrowserFilter.cs

@@ -45,7 +45,7 @@ private static bool IsChromeBrowser(string userAgentContext)
                 return false;
             }
 
-            return userAgentContext.Contains("chrome", StringComparison.OrdinalIgnoreCase) && 
+            return userAgentContext.Contains("chrome", StringComparison.OrdinalIgnoreCase) &&
                 !userAgentContext.Contains("edg", StringComparison.OrdinalIgnoreCase);
         }
 

examples/BlazorServerApp/Program.cs

@@ -48,4 +48,4 @@ public static void Main(string[] args)
             app.Run();
         }
     }
-}
+}

examples/ConsoleApp/AccountServiceContext.cs

@@ -4,4 +4,4 @@
 class AccountServiceContext : IAccountContext
 {
     public string AccountId { get; set; }
-}
+}

examples/ConsoleApp/ConsoleApp.csproj

@@ -21,4 +21,8 @@
     </None>
   </ItemGroup>
 
+  <PropertyGroup>
+    <EnforceCodeStyleInBuild>True</EnforceCodeStyleInBuild>
+  </PropertyGroup>
+
 </Project>

examples/ConsoleApp/Program.cs

@@ -1,4 +1,7 @@
-using Microsoft.Extensions.Configuration;
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT license.
+//
+using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.FeatureManagement;
 
@@ -49,4 +52,4 @@
         // Output results
         Console.WriteLine($"The {FeatureName} feature is {(enabled ? "enabled" : "disabled")} for the '{account}' account.");
     }
-}
+}

examples/FeatureFlagDemo/Authentication/QueryStringAuthenticationHandler.cs

@@ -2,14 +2,10 @@
 // Licensed under the MIT license.
 //
 using Microsoft.AspNetCore.Authentication;
-using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 using Microsoft.Extensions.Primitives;
-using System.Collections.Generic;
-using System.Linq;
 using System.Security.Claims;
 using System.Text.Encodings.Web;
-using System.Threading.Tasks;
 
 namespace FeatureFlagDemo.Authentication
 {

examples/FeatureFlagDemo/BrowserFilter.cs

@@ -1,12 +1,7 @@
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT license.
 //
-using Microsoft.AspNetCore.Http;
-using Microsoft.Extensions.Configuration;
 using Microsoft.FeatureManagement;
-using System;
-using System.Linq;
-using System.Threading.Tasks;
 
 namespace FeatureFlagDemo.FeatureManagement.FeatureFilters
 {

examples/FeatureFlagDemo/BrowserFilterSettings.cs

@@ -1,8 +1,6 @@
 // Copyright (c) Microsoft Corporation.
 // Licensed under the MIT license.
 //
-using System.Collections.Generic;
-
 namespace FeatureFlagDemo.FeatureManagement.FeatureFilters
 {
     public class BrowserFilterSettings