Used constants instead of fields (#8394)

Author: glen-84

.editorconfig

@@ -216,6 +216,8 @@ dotnet_diagnostic.RCS0063.severity = warning
 dotnet_diagnostic.RCS1036.severity = none # see https://github.com/dotnet/roslynator/issues/1632
 # Remove redundant 'ToString' call.
 dotnet_diagnostic.RCS1097.severity = warning
+# Use constant instead of field.
+dotnet_diagnostic.RCS1187.severity = warning
 # Convert interpolated string to concatenation.
 dotnet_diagnostic.RCS1217.severity = warning
 # Unnecessary null-forgiving operator.

src/HotChocolate/Core/src/Types.NodaTime/ZonedDateTimeType.cs

@@ -12,9 +12,9 @@ namespace HotChocolate.Types.NodaTime;
 /// </summary>
 public class ZonedDateTimeType : StringToStructBaseType<ZonedDateTime>
 {
-    private static readonly string s_formatString = "uuuu'-'MM'-'dd'T'HH':'mm':'ss' 'z' 'o<g>";
+    private const string FormatString = "uuuu'-'MM'-'dd'T'HH':'mm':'ss' 'z' 'o<g>";
     private static readonly ZonedDateTimePattern s_default =
-        ZonedDateTimePattern.CreateWithInvariantCulture(s_formatString, DateTimeZoneProviders.Tzdb);
+        ZonedDateTimePattern.CreateWithInvariantCulture(FormatString, DateTimeZoneProviders.Tzdb);
 
     private readonly IPattern<ZonedDateTime>[] _allowedPatterns;
     private readonly IPattern<ZonedDateTime> _serializationPattern;

src/StrawberryShake/CodeGeneration/src/CodeGeneration.CSharp/Generators/DependencyInjectionGenerator.cs

@@ -99,7 +99,7 @@ protected override void Generate(
             GenerateClientForProfile(settings, factory, descriptor, profile);
         }
 
-        factory.AddClass(s_clientServiceProvider);
+        factory.AddClass(ClientServiceProvider);
 
         factory.Build(writer);
     }
@@ -900,7 +900,7 @@ private static ICode CreateBaseCode(CSharpSyntaxGeneratorSettings settings)
                             .AddArgument(Sp)))));
     }
 
-    private static readonly string s_clientServiceProvider =
+    private const string ClientServiceProvider =
         @"private sealed class ClientServiceProvider
                 : System.IServiceProvider
                 , System.IDisposable