Question on comparing array sigs about dnlib HOT 1 CLOSED

using dnlib.DotNet;
using dnlib.DotNet.Emit;

....

            {
                var mod = new ModuleDefUser("themod", Guid.NewGuid());
                var asm = new AssemblyDefUser("themod", new Version(0, 0, 0, 0));
                asm.Modules.Add(mod);
                mod.Kind = ModuleKind.Dll;

                var cl = new TypeDefUser("ns", "Class1", mod.CorLibTypes.Object.TypeDefOrRef);
                mod.Types.Add(cl);
                cl.Visibility = TypeAttributes.Public;

                var arg1 = new ArraySig(mod.CorLibTypes.Double, 2);
                arg1.LowerBounds.Add(0);
                arg1.LowerBounds.Add(0);
                var meth = new MethodDefUser("Method", MethodSig.CreateStatic(mod.CorLibTypes.Int32, arg1),
                    MethodImplAttributes.IL | MethodImplAttributes.Managed,
                    MethodAttributes.Public | MethodAttributes.Static);
                cl.Methods.Add(meth);
                var body = new CilBody();
                meth.Body = body;
                body.Instructions.Add(OpCodes.Ldc_I4_3.ToInstruction());
                body.Instructions.Add(OpCodes.Ret.ToInstruction());

                mod.Write(@"C:\arytest\themod.dll");
            }
            {
                var mod = new ModuleDefUser("theexe", Guid.NewGuid());
                var asm = new AssemblyDefUser("theexe", new Version(0, 0, 0, 0));
                asm.Modules.Add(mod);
                mod.Kind = ModuleKind.Console;

                var cl = new TypeDefUser("main", "Start", mod.CorLibTypes.Object.TypeDefOrRef);
                mod.Types.Add(cl);

                var asmRef = new AssemblyRefUser("themod", new Version(0, 0, 0, 0));
                var tr = new TypeRefUser(mod, "ns", "Class1", asmRef);
                var arg1 = new ArraySig(mod.CorLibTypes.Double, 2);
// Comment these and the program will fail because the correct method can't be found
                arg1.LowerBounds.Add(0);
                arg1.LowerBounds.Add(0);
                var mr = new MemberRefUser(mod, "Method", MethodSig.CreateStatic(mod.CorLibTypes.Int32, arg1), tr);

                var meth = new MethodDefUser("Method", MethodSig.CreateStatic(mod.CorLibTypes.Void),
                    MethodImplAttributes.IL | MethodImplAttributes.Managed,
                    MethodAttributes.Public | MethodAttributes.Static);
                cl.Methods.Add(meth);
                mod.EntryPoint = meth;
                var body = new CilBody();
                meth.Body = body;
                body.Instructions.Add(OpCodes.Ldnull.ToInstruction());
                body.Instructions.Add(OpCodes.Call.ToInstruction(mr));
                body.Instructions.Add(OpCodes.Pop.ToInstruction());
                body.Instructions.Add(OpCodes.Ret.ToInstruction());

                mod.Write(@"C:\arytest\theexe.exe");
            }