Use reserved namespace "QuickType" in C# to avoid the conflict between the top-level type and namespace name.

src/Language/CSharp.purs

@@ -19,7 +19,7 @@ import IRGraph (IRClassData(..), IRType(..), IRUnionRep, Named, forUnion_, isUni
 import Options (Option, booleanOption, enumOption)
 
 forbiddenNames :: Array String
-forbiddenNames = ["Converter", "JsonConverter", "Type", "Serialize"]
+forbiddenNames = ["QuickType", "Converter", "JsonConverter", "Type", "Serialize"]
 
 listOption :: Option Boolean
 listOption = enumOption "array-type" "Select C# type to use for JSON arrays" [Tuple "array" false, Tuple "list" true]
@@ -119,7 +119,7 @@ csharpDoc = do
         oneOfThese <- getForSingleOrMultipleTopLevels "" " one of these"
         line $ "// To parse this JSON data, add NuGet 'Newtonsoft.Json' then do" <> oneOfThese <> ":"
         line "//"
-        line $ "//    using " <> module_ <> ";"
+        line $ "//    using QuickType;"
         forEachTopLevel_ \topLevelName topLevelType -> do
             line "//"
             line $ "//    var data = " <> module_ <> ".FromJson(jsonString);"
@@ -127,7 +127,7 @@ csharpDoc = do
         line "// For POCOs visit quicktype.io?poco"
         line "//"
     
-    line $ "namespace " <> module_
+    line "namespace QuickType"
     line "{"
     indent do
         let using s = line $ "using " <> s <> ";"

test/fixtures/csharp/Program.cs

@@ -8,7 +8,7 @@ namespace QuickType
         {
             var path = args[0];
             var json = System.IO.File.ReadAllText(path);
-            var output = QuickType.FromJson(json).ToJson();
+            var output = TopLevel.FromJson(json).ToJson();
             Console.WriteLine("{0}", output);
         }
     }

test/test.ts

@@ -231,7 +231,7 @@ class CSharpJSONFixture extends JSONFixture {
   setupCommand = "dotnet restore --no-cache";
   diffViaSchema = true;
   output = "QuickType.cs";
-  topLevel = "QuickType";
+  topLevel = "TopLevel";
 
   async test(sample: string) {
     compareJsonFileToJson({