Fix Stream.Read warning properly, suppress only legitimate warnings

- CA2022: Fixed by using ReadExactly instead of Read
- CA1416: Suppressed - this is a Windows-only WPF app
- Nullable disabled - legacy 18-year-old codebase

Author: shanselman

Audio.cs

@@ -64,7 +64,7 @@ private static byte[] GetWavResource(string wav)
                 using (Stream strm = Assembly.GetExecutingAssembly().GetManifestResourceStream(strName))
                 {
                     var arrWav = new Byte[strm.Length];
-                    strm.Read(arrWav, 0, (int)strm.Length);
+                    strm.ReadExactly(arrWav, 0, (int)strm.Length);
                     cachedWavs.Add(wav, arrWav);
                     return arrWav;
                 }

BabySmash.csproj

@@ -36,7 +36,11 @@
     <!-- Suppress expected warnings -->
     <!-- WFO0003: Using Windows Forms in WPF app - intentional for Screen API -->
     <!-- IL3000: Assembly.Location in single-file - we handle this -->
-    <NoWarn>$(NoWarn);WFO0003;IL3000</NoWarn>
+    <!-- CA1416: Platform compatibility - this is a Windows-only WPF app -->
+    <NoWarn>$(NoWarn);WFO0003;IL3000;CA1416</NoWarn>
+    
+    <!-- Nullable - disable for legacy code migration -->
+    <Nullable>disable</Nullable>
   </PropertyGroup>
 
   <!-- Exclude old TFS build templates -->