Suppress compiler warning in generated code for unused field

src/NSwag.CodeGeneration.CSharp/Templates/File.Header.liquid

@@ -2,11 +2,12 @@
 #pragma warning disable 114 // Disable "CS0114 '{derivedDto}.RaisePropertyChanged(String)' hides inherited member 'dtoBase.RaisePropertyChanged(String)'. To make the current member override that implementation, add the override keyword. Otherwise add the new keyword."
 #pragma warning disable 472 // Disable "CS0472 The result of the expression is always 'false' since a value of type 'Int32' is never equal to 'null' of type 'Int32?'
 #pragma warning disable 612 // Disable "CS0612 '...' is obsolete"
+#pragma warning disable 649 // Disable "CS0649 Field is never assigned to, and will always have its default value null"
 #pragma warning disable 1573 // Disable "CS1573 Parameter '...' has no matching param tag in the XML comment for ...
 #pragma warning disable 1591 // Disable "CS1591 Missing XML comment for publicly visible type or member ..."
 #pragma warning disable 8073 // Disable "CS8073 The result of the expression is always 'false' since a value of type 'T' is never equal to 'null' of type 'T?'"
 #pragma warning disable 3016 // Disable "CS3016 Arrays as attribute arguments is not CLS-compliant"
 #pragma warning disable 8603 // Disable "CS8603 Possible null reference return"
 #pragma warning disable 8604 // Disable "CS8604 Possible null reference argument for parameter"
 #pragma warning disable 8625 // Disable "CS8625 Cannot convert null literal to non-nullable reference type"
-#pragma warning disable CS8765 // Nullability of type of parameter doesn't match overridden member (possibly because of nullability attributes).
+#pragma warning disable 8765 // Disable "CS8765 Nullability of type of parameter doesn't match overridden member (possibly because of nullability attributes)."