Removed case-insensitive comparisons from DisableQueryStringAttribute. (#837)

Author: Bart Koelman

src/Examples/JsonApiDotNetCoreExample/Services/SkipCacheQueryStringParameterReader.cs

@@ -14,7 +14,7 @@ public class SkipCacheQueryStringParameterReader : IQueryStringParameterReader
 
         public bool IsEnabled(DisableQueryStringAttribute disableQueryStringAttribute)
         {
-            return !disableQueryStringAttribute.ParameterNames.Contains(_skipCacheParameterName.ToLowerInvariant());
+            return !disableQueryStringAttribute.ParameterNames.Contains(_skipCacheParameterName);
         }
 
         public bool CanRead(string parameterName)

src/JsonApiDotNetCore/Controllers/Annotations/DisableQueryStringAttribute.cs

@@ -35,7 +35,7 @@ public DisableQueryStringAttribute(StandardQueryStringParameters parameters)
                 if (value != StandardQueryStringParameters.None && value != StandardQueryStringParameters.All &&
                     parameters.HasFlag(value))
                 {
-                    parameterNames.Add(value.ToString().ToLowerInvariant());
+                    parameterNames.Add(value.ToString());
                 }
             }
 
@@ -51,12 +51,12 @@ public DisableQueryStringAttribute(string parameterNames)
         {
             if (parameterNames == null) throw new ArgumentNullException(nameof(parameterNames));
 
-            ParameterNames = parameterNames.Split(",").Select(x => x.Trim().ToLowerInvariant()).ToList();
+            ParameterNames = parameterNames.Split(",").ToList();
         }
 
         public bool ContainsParameter(StandardQueryStringParameters parameter)
         {
-            var name = parameter.ToString().ToLowerInvariant();
+            var name = parameter.ToString();
             return ParameterNames.Contains(name);
         }
     }