private Assembly?GetFirstResolvedAssemblyFromResolvingEvent(AssemblyName assemblyName)
{
Assembly?resolvedAssembly = null;
Func <AssemblyLoadContext, AssemblyName, Assembly>?resolvingHandler = _resolving;
if (resolvingHandler != null)
{
// Loop through the event subscribers and return the first non-null Assembly instance
foreach (Func <AssemblyLoadContext, AssemblyName, Assembly> handler in resolvingHandler.GetInvocationList())
{
resolvedAssembly = handler(this, assemblyName);
#if CORECLR
if (AssemblyLoadContext.IsTracingEnabled())
{
AssemblyLoadContext.TraceResolvingHandlerInvoked(
assemblyName.FullName,
handler.Method.Name,
this != AssemblyLoadContext.Default ? ToString() : Name,
resolvedAssembly?.FullName,
resolvedAssembly != null && !resolvedAssembly.IsDynamic ? resolvedAssembly.Location : null);
}
#endif // CORECLR
if (resolvedAssembly != null)
{
return(resolvedAssembly);
}
}
}
return(null);
}
private static RuntimeAssembly?InvokeResolveEvent(ResolveEventHandler?eventHandler, RuntimeAssembly assembly, string name)
{
if (eventHandler == null)
{
return(null);
}
var args = new ResolveEventArgs(name, assembly);
foreach (ResolveEventHandler handler in eventHandler.GetInvocationList())
{
Assembly?asm = handler(AppDomain.CurrentDomain, args);
#if CORECLR
if (eventHandler == AssemblyResolve && AssemblyLoadContext.IsTracingEnabled())
{
AssemblyLoadContext.TraceAssemblyResolveHandlerInvoked(
name,
handler.Method.Name,
asm?.FullName,
asm != null && !asm.IsDynamic ? asm.Location : null);
}
#endif // CORECLR
RuntimeAssembly?ret = GetRuntimeAssembly(asm);
if (ret != null)
{
return(ret);
}
}
return(null);
}
private Assembly?ResolveSatelliteAssembly(AssemblyName assemblyName)
{
// Called by native runtime when CultureName is not empty
Debug.Assert(assemblyName.CultureName?.Length > 0);
const string SatelliteSuffix = ".resources";
if (assemblyName.Name == null || !assemblyName.Name.EndsWith(SatelliteSuffix, StringComparison.Ordinal))
{
return(null);
}
string parentAssemblyName = assemblyName.Name.Substring(0, assemblyName.Name.Length - SatelliteSuffix.Length);
Assembly parentAssembly = LoadFromAssemblyName(new AssemblyName(parentAssemblyName));
AssemblyLoadContext parentALC = GetLoadContext(parentAssembly) !;
string?parentDirectory = Path.GetDirectoryName(parentAssembly.Location);
if (parentDirectory == null)
{
return(null);
}
string assemblyPath = Path.Combine(parentDirectory, assemblyName.CultureName !, $"{assemblyName.Name}.dll");
bool exists = System.IO.FileSystem.FileExists(assemblyPath);
if (!exists && PathInternal.IsCaseSensitive)
{
#if CORECLR
if (AssemblyLoadContext.IsTracingEnabled())
{
AssemblyLoadContext.TraceSatelliteSubdirectoryPathProbed(assemblyPath, HResults.COR_E_FILENOTFOUND);
}
#endif // CORECLR
assemblyPath = Path.Combine(parentDirectory, assemblyName.CultureName !.ToLowerInvariant(), $"{assemblyName.Name}.dll");
exists = System.IO.FileSystem.FileExists(assemblyPath);
}
Assembly?asm = exists ? parentALC.LoadFromAssemblyPath(assemblyPath) : null;
#if CORECLR
if (AssemblyLoadContext.IsTracingEnabled())
{
AssemblyLoadContext.TraceSatelliteSubdirectoryPathProbed(assemblyPath, exists ? HResults.S_OK : HResults.COR_E_FILENOTFOUND);
}
#endif // CORECLR
return(asm);
}
