Compiler Error C3146

illegal __nogc reference to managed type 'type'

An attempt was made to create an unmanaged reference to a variable of a managed type.

C3146 is only reachable using /clr:oldSyntax.

The following sample generates C3146:

// C3146.cpp
// compile with: /clr:oldSyntax
#using <mscorlib.dll>
int main() {
   System::String *str1 = new System::String("test");
   System::String __nogc& str2 = *str1;  // C3146
   System::String & str3 = *str1;     // OK equivalent to __gc& str2