keep unloading the dbi

Author: max-charlamb

src/SOS/SOS.Hosting/RuntimeWrapper.cs

@@ -156,6 +156,19 @@ protected override void Destroy()
                 ComWrapper.ReleaseWithCheck(_cdacDataProcess);
                 _cdacDataProcess = IntPtr.Zero;
             }
+            if (_dacHandle != IntPtr.Zero)
+            {
+                _dacHandle = IntPtr.Zero;
+            }
+            if (_cdacHandle != IntPtr.Zero)
+            {
+                _cdacHandle = IntPtr.Zero;
+            }
+            if (_dbiHandle != IntPtr.Zero)
+            {
+                DataTarget.PlatformFunctions.FreeLibrary(_dbiHandle);
+                _dbiHandle = IntPtr.Zero;
+            }
         }
 
         #region IRuntime (native)