fix Decimal processing in CSharp

Author: frantuma

pom.xml

@@ -262,7 +262,7 @@
     </dependencies>
     <properties>
         <maven.compiler.release>8</maven.compiler.release>
-        <swagger-codegen-version>3.0.64</swagger-codegen-version>
+        <swagger-codegen-version>3.0.65-SNAPSHOT</swagger-codegen-version>
         <swagger-parser-version>2.1.22</swagger-parser-version>
         <swagger-core-version>2.2.25</swagger-core-version>
         <jackson-version>2.17.2</jackson-version>

src/main/java/io/swagger/codegen/v3/generators/DefaultCodegenConfig.java

@@ -2168,7 +2168,7 @@ public CodegenOperation fromOperation(String path, String httpMethod, Operation
 
                 if (schema == null) {
                     CodegenParameter codegenParameter = CodegenModelFactory.newInstance(CodegenModelType.PARAMETER);
-                    codegenParameter.description = body.getDescription();
+                    codegenParameter.description = escapeText(body.getDescription());
                     codegenParameter.unescapedDescription = body.getDescription();
                     String bodyName = REQUEST_BODY_NAME;
                     if (body.getExtensions() != null && body.getExtensions().get("x-codegen-request-body-name") != null) {
@@ -2679,7 +2679,7 @@ public CodegenParameter fromRequestBody(RequestBody body, String name, Schema sc
         }
         codegenParameter.baseName = bodyName;
         codegenParameter.paramName = bodyName;
-        codegenParameter.description = body.getDescription();
+        codegenParameter.description = escapeText(body.getDescription());
         codegenParameter.unescapedDescription = body.getDescription();
         codegenParameter.required = body.getRequired() != null ? body.getRequired() : Boolean.FALSE;
         codegenParameter.getVendorExtensions().put(CodegenConstants.IS_BODY_PARAM_EXT_NAME, Boolean.TRUE);

src/main/java/io/swagger/codegen/v3/generators/dotnet/AbstractCSharpCodegen.java

@@ -152,6 +152,8 @@ public AbstractCSharpCodegen() {
                         "String",
                         "Boolean",
                         "Double",
+                        "Decimal",
+                        "BigDecimal",
                         "Int32",
                         "Int64",
                         "Float",