Merge in 'release/7.0' changes

Author: dotnet-bot

src/libraries/System.Reflection.DispatchProxy/src/System/Reflection/DispatchProxyGenerator.cs

@@ -117,19 +117,9 @@ private sealed class ProxyAssembly
             [RequiresDynamicCode("Defining a dynamic assembly requires generating code at runtime")]
             public ProxyAssembly(AssemblyLoadContext alc)
             {
-                string name;
-                if (alc == AssemblyLoadContext.Default)
-                {
-                    name = "ProxyBuilder";
-                }
-                else
-                {
-                    string? alcName = alc.Name;
-                    name = string.IsNullOrEmpty(alcName) ? $"DispatchProxyTypes.{alc.GetHashCode()}" : $"DispatchProxyTypes.{alcName}";
-                }
                 AssemblyBuilderAccess builderAccess =
                     alc.IsCollectible ? AssemblyBuilderAccess.RunAndCollect : AssemblyBuilderAccess.Run;
-                _ab = AssemblyBuilder.DefineDynamicAssembly(new AssemblyName(name), builderAccess);
+                _ab = AssemblyBuilder.DefineDynamicAssembly(new AssemblyName("ProxyBuilder"), builderAccess);
                 _mb = _ab.DefineDynamicModule("testmod");
             }
 

src/libraries/System.Reflection.DispatchProxy/tests/DispatchProxyTests.cs

@@ -681,5 +681,24 @@ static object CreateTestDispatchProxy(Type type) =>
                     .MakeGenericMethod(typeof(IDisposable), type)
                     .Invoke(null, null);
         }
+
+        [Fact]
+        public static void Test_Multiple_AssemblyLoadContextsWithBadName()
+        {
+            if (typeof(DispatchProxyTests).Assembly.Location == "")
+                return;
+
+            Assembly assembly = Assembly.LoadFile(typeof(DispatchProxyTests).Assembly.Location);
+            Type type = assembly.GetType(typeof(DispatchProxyTests).FullName);
+            MethodInfo method = type.GetMethod(nameof(Demo), BindingFlags.NonPublic | BindingFlags.Static);
+            Assert.True((bool)method.Invoke(null, null));
+        }
+
+        internal static bool Demo()
+        {
+            TestType_IHelloService proxy = DispatchProxy.Create<TestType_IHelloService, InternalInvokeProxy>();
+            proxy.Hello("Hello");
+            return true;
+        }
     }
 }