diff --git a/tool/resources/org/antlr/v4/tool/templates/codegen/CSharp/CSharp.stg b/tool/resources/org/antlr/v4/tool/templates/codegen/CSharp/CSharp.stg
index 67afbe0a5..349c439e4 100644
--- a/tool/resources/org/antlr/v4/tool/templates/codegen/CSharp/CSharp.stg
+++ b/tool/resources/org/antlr/v4/tool/templates/codegen/CSharp/CSharp.stg
@@ -64,6 +64,7 @@ using IToken = Antlr4.Runtime.IToken;
 /// \<see cref="<csIdentifier.(file.parserName)>"/>.
 /// \</summary>
 [System.CodeDom.Compiler.GeneratedCode("ANTLR", "<file.ANTLRVersion>")]
+[System.CLSCompliant(false)]
 public interface I<file.grammarName>Listener : IParseTreeListener {
 	<file.listenerNames:{lname |
 /// \<summary>
@@ -101,6 +102,7 @@ using ParserRuleContext = Antlr4.Runtime.ParserRuleContext;
 /// of the available methods.
 /// \</summary>
 [System.CodeDom.Compiler.GeneratedCode("ANTLR", "<file.ANTLRVersion>")]
+[System.CLSCompliant(false)]
 public partial class <file.grammarName>BaseListener : I<file.grammarName>Listener {
 	<file.listenerNames:{lname |
 /// \<summary>
@@ -150,6 +152,7 @@ using IToken = Antlr4.Runtime.IToken;
 /// \</summary>
 /// \<typeparam name="Result">The return type of the visit operation.\</typeparam>
 [System.CodeDom.Compiler.GeneratedCode("ANTLR", "<file.ANTLRVersion>")]
+[System.CLSCompliant(false)]
 public interface I<file.grammarName>Visitor\<Result> : IParseTreeVisitor\<Result> {
 	<file.visitorNames:{lname |
 /// \<summary>
@@ -182,6 +185,7 @@ using ParserRuleContext = Antlr4.Runtime.ParserRuleContext;
 /// \</summary>
 /// \<typeparam name="Result">The return type of the visit operation.\</typeparam>
 [System.CodeDom.Compiler.GeneratedCode("ANTLR", "<file.ANTLRVersion>")]
+[System.CLSCompliant(false)]
 public partial class <file.grammarName>BaseVisitor\<Result> : AbstractParseTreeVisitor\<Result>, I<file.grammarName>Visitor\<Result> {
 	<file.visitorNames:{lname |
 /// \<summary>
@@ -220,6 +224,7 @@ Parser(parser, funcs, atn, sempredFuncs, superClass) ::= <<
 
 Parser_(parser, funcs, atn, sempredFuncs, ctor, superClass) ::= <<
 [System.CodeDom.Compiler.GeneratedCode("ANTLR", "<file.ANTLRVersion>")]
+[System.CLSCompliant(false)]
 public <if(parser.abstractRecognizer)>abstract <endif>partial class <csIdentifier.(parser.name)> : <superClass> {
 	<if(parser.tokens)>
 	public const int
@@ -908,6 +913,7 @@ using DFA = Antlr4.Runtime.Dfa.DFA;
 
 Lexer(lexer, atn, actionFuncs, sempredFuncs, superClass) ::= <<
 [System.CodeDom.Compiler.GeneratedCode("ANTLR", "<file.ANTLRVersion>")]
+[System.CLSCompliant(false)]
 public <if(lexer.abstractRecognizer)>abstract <endif>partial class <csIdentifier.(lexer.name)> : <superClass> {
 	public const int
 		<lexer.tokens:{k | <k>=<lexer.tokens.(k)>}; separator=", ", wrap, anchor>;