Fix warnings when the internal library loader fails to find a library

Client/Platform/DynamicLibraryLoader.cs

@@ -1,21 +1,12 @@
-using FFmpeg.AutoGen;
-using SDL2;
-using SysDVR.Client.Core;
-using System;
+using System;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
-using System.Data;
-using System.Diagnostics.Contracts;
 using System.IO;
 using System.Linq;
 using System.Reflection;
 using System.Runtime.InteropServices;
-using System.Runtime.Intrinsics.Arm;
-using System.Security.Cryptography;
 using System.Text;
 using System.Text.RegularExpressions;
-using System.Threading.Tasks;
-using System.Xml.Linq;
 
 namespace SysDVR.Client.Platform
 {
@@ -121,8 +112,12 @@ static IntPtr CachedLibraryloader(string libraryName, Assembly assembly, DllImpo
 
  var loaded = TryLoadLibrary(libraryName);
 
- if (loaded != IntPtr.Zero)
- LibraryCache.TryAdd(libraryName, loaded);
+ if (loaded == IntPtr.Zero && Program.Options.Debug.DynLib)
+ Console.WriteLine($"CachedLibraryloader failed to resolve {libraryName}");
+
+ // Cache the failure so we don't try again
+ // Dotnet will try to load the library again using its own resolver if we return IntPtr.Zero
+ LibraryCache.TryAdd(libraryName, loaded);
 
  return loaded;
  }
@@ -174,7 +169,6 @@ public static IntPtr TryLoadLibrary(string libraryName)
  return TryLoadLibrary(withoutNumber);
  }
 
- Console.WriteLine($"Failed to load {libraryName}");
  return IntPtr.Zero;
  }