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 349c439e4..b272d56f5 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
@@ -216,6 +216,14 @@ fileHeader(grammarFileName, ANTLRVersion) ::= <<
 //------------------------------------------------------------------------------
 
 // Generated from <grammarFileName> by ANTLR <ANTLRVersion>
+
+// Unreachable code detected
+#pragma warning disable 0162
+// The variable '...' is assigned but its value is never used
+#pragma warning disable 0219
+// Missing XML comment for publicly visible type or member '...'
+#pragma warning disable 1591
+
 >>
 
 Parser(parser, funcs, atn, sempredFuncs, superClass) ::= <<