[aspnetcore] exampleJson invalid template generation of over-quoted \\" for array of strings

Description

When generating aspnetcore server code, the controller template for exampleJson renders incorrect escaped output. Double Backslash followed by quote which breaks the build. It seems to be when inside an array and where the values are string not integer.

exampleJson = .... Shortened

\"metadata\" : [ [ {\n \"values\" : [ \"[\\"Value 1\\",\\"Value 2\\",\\"Value 3\\"]\", \"[\\"Value 1\\",\\"Value 2\\",\\"Value 3\\"]\" ],\n \"key\" : \"Key 1\"\n },

note the \"

Swagger-codegen version

3.0.10

Swagger declaration file content or url

MetaData:
      type: object
      properties:
        key:
          type: string
          example: Key 1
        values:
          type: array
          items:
            type: string
            example: 
              - Value 1
              - Value 2
              - Value 3

Command line used for generation

swagger-codegen generate
-i ./conferences.yaml
-l aspnetcore
--aspnet-core-version 2.2
--interface-controller
-c config.json
-o ../

Steps to reproduce

• run command
• examine output
• look at incorrect quotes
• note - it only seems to be with strings in arrays of this pattern

Related issues/PRs

#9586
#5460

Suggest a fix/enhancement

Looked at AbstractCSharpCodegen.java as possible candidate but wanted to check if there is an obvious reason first.

if (operation.examples != null){ for (Map<String, String> example : operation.examples) { for (Map.Entry<String, String> entry : example.entrySet()) { // Replace " with \", \r, \n with \\r, \\n String val = entry.getValue().replace("\"", "\\\"") .replace("\r","\\r") .replace("\n","\\n"); entry.setValue(val); } } }

Reproduce the generated aspnetcore controller with the supplied YAML and command, then inspect the example-processing code in AbstractCSharpCodegen.java. Compare string-array examples with integer arrays and verify that the generated controller builds without over-quoted values.