sanitize model name (C#)

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/AspNet5ServerCodegen.java

@@ -311,6 +311,8 @@ public class AspNet5ServerCodegen extends DefaultCodegen implements CodegenConfi
     // TODO: Create a base C# abstract type to avoid duplication of language functionality
     @Override
     public String toModelName(String name) {
+        name = sanitizeName(name);
+
         // model name cannot use reserved keyword, e.g. return
         if (reservedWords.contains(name)) {
             throw new RuntimeException(name + " (reserved word) cannot be used as a model name");

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/CSharpClientCodegen.java

@@ -339,6 +339,8 @@ public class CSharpClientCodegen extends DefaultCodegen implements CodegenConfig
 
     @Override
     public String toModelName(String name) {
+        name = sanitizeName(name);
+
         // model name cannot use reserved keyword, e.g. return
         if (reservedWords.contains(name)) {
             throw new RuntimeException(name + " (reserved word) cannot be used as a model name");

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/CsharpDotNet2ClientCodegen.java

@@ -215,6 +215,8 @@ public class CsharpDotNet2ClientCodegen extends DefaultCodegen implements Codege
 
     @Override
     public String toModelName(String name) {
+        name = sanitizeName(name);
+
         // model name cannot use reserved keyword, e.g. return
         if (reservedWords.contains(name)) {
             throw new RuntimeException(name + " (reserved word) cannot be used as a model name");