Test to create ByRefLike instance through a generic parameter (#101004)

* Test to create ByRefLike instance through a generic parameter

Author: AaronRobinsonMSFT

src/tests/Loader/classloader/generics/ByRefLike/InvalidCSharp.il

@@ -73,6 +73,26 @@
 
     .field public !T Field
 
+    .method public hidebysig
+        instance !T CreateDefaultInstance() cil managed
+    {
+        .locals init (
+            [0] !T
+        )
+        ldloca.s 0
+        initobj !T
+        ldloc.0
+        ret
+    }
+
+    .method public hidebysig
+        instance class [System.Runtime]System.Type GetGenericType() cil managed
+    {
+        ldtoken !T
+        call class [System.Runtime]System.Type [System.Runtime]System.Type::GetTypeFromHandle(valuetype [System.Runtime]System.RuntimeTypeHandle)
+        ret
+    }
+
     .method public hidebysig
         instance object BoxAsObject(!T) cil managed
     {
@@ -564,6 +584,24 @@
         ret
     }
 
+    .method public hidebysig static
+        string CreateDefaultInstance() cil managed
+    {
+        .locals init (
+            [0] valuetype InvalidCSharp.GenericByRefLike_Over`1<valuetype ByRefLikeType>
+        )
+
+        ldloca.s 0
+        initobj valuetype InvalidCSharp.GenericByRefLike_Over`1<valuetype ByRefLikeType>
+        ldloca.s 0
+        call instance !0 valuetype InvalidCSharp.GenericByRefLike_Over`1<valuetype ByRefLikeType>::CreateDefaultInstance()
+        pop
+        ldloca.s 0
+        call instance class [System.Runtime]System.Type valuetype InvalidCSharp.GenericByRefLike_Over`1<valuetype ByRefLikeType>::GetGenericType()
+        callvirt instance string [System.Runtime]System.Object::ToString()
+        ret
+    }
+
     .method public hidebysig static
         object BoxAsObject() cil managed
     {

src/tests/Loader/classloader/generics/ByRefLike/Validate.cs

@@ -21,6 +21,7 @@ public static void Validate_TypeLoad()
         Console.WriteLine($" -- Instantiate: {Exec.GenericValueType()}");
         Console.WriteLine($" -- Instantiate: {Exec.GenericByRefLike()}");
         Console.WriteLine($" -- Instantiate: {Exec.GenericByRefLike_ConstraintsAreIndependent_Int32_Int32()}");
+        Console.WriteLine($" -- Create: {Exec.CreateDefaultInstance()}");
 
         Assert.Throws<TypeLoadException>(() => { Exec.GenericClass_Invalid(); });
         Assert.Throws<TypeLoadException>(() => { Exec.GenericInterface_Invalid(); });