namespace System.Reflection.Emit
{
-    public sealed partial class AssemblyBuilder : System.Reflection.Assembly
+    public abstract partial class AssemblyBuilder : System.Reflection.Assembly
    {
-        internal AssemblyBuilder();
+        protected AssemblyBuilder();
-        public System.Reflection.Emit.ModuleBuilder DefineDynamicModule(string name);
+        public abstract System.Reflection.Emit.ModuleBuilder DefineDynamicModule(string name);
-        public System.Reflection.Emit.ModuleBuilder? GetDynamicModule(string name);
+        public abstract System.Reflection.Emit.ModuleBuilder? GetDynamicModule(string name);
-        public void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
+        public abstract void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
-        public void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);
+        public abstract void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);
   }
       
-    public sealed partial class ConstructorBuilder : System.Reflection.ConstructorInfo
+    public abstract partial class ConstructorBuilder : System.Reflection.ConstructorInfo
    {
-        internal ConstructorBuilder();
+        protected ConstructorBuilder();
-        public bool InitLocals { get; set; }
+        public abstract bool InitLocals { get; set; }
-        public System.Reflection.Emit.ParameterBuilder DefineParameter(int iSequence, System.Reflection.ParameterAttributes attributes, string? strParamName);
+        public abstract System.Reflection.Emit.ParameterBuilder DefineParameter(int iSequence, System.Reflection.ParameterAttributes attributes, string? strParamName);
-        public System.Reflection.Emit.ILGenerator GetILGenerator();
+        public abstract ILGenerator GetILGenerator();
-        public System.Reflection.Emit.ILGenerator GetILGenerator(int streamSize);
+        public abstract System.Reflection.Emit.ILGenerator GetILGenerator(int streamSize);
-        public void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
+        public abstract  void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
-        public void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);
+        public abstract void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);
-        public void SetImplementationFlags(System.Reflection.MethodImplAttributes attributes;
+        public abstract void SetImplementationFlags(System.Reflection.MethodImplAttributes attributes);
    }
    
-    public sealed partial class EnumBuilder : System.Reflection.TypeInfo
+    public abstract partial class EnumBuilder : System.Reflection.TypeInfo
    {
-        internal EnumBuilder();
+        protected EnumBuilder();
-        public System.Reflection.Emit.FieldBuilder UnderlyingField { get; }
+        public abstract System.Reflection.Emit.FieldBuilder UnderlyingField { get ; }
-        public System.Reflection.TypeInfo CreateTypeInfo();
+        public abstract System.Reflection.TypeInfo CreateTypeInfo();
-        public System.Reflection.Emit.FieldBuilder DefineLiteral(string literalName, object? literalValue);
+        public abstract System.Reflection.Emit.FieldBuilder DefineLiteral(string literalName, object? literalValue);
-        public void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
+        public abstract void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);
-        public void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
+        public abstract void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);
    }
    
-    public sealed partial class EventBuilder
+    public abstract partial class EventBuilder
    {
-        internal EventBuilder();
+        protected EventBuilder();
-        public void AddOtherMethod(System.Reflection.Emit.MethodBuilder mdBuilder);
+        public abstract void AddOtherMethod(System.Reflection.Emit.MethodBuilder mdBuilder);
-        public void SetAddOnMethod(System.Reflection.Emit.MethodBuilder mdBuilder);
+        public abstract void SetAddOnMethod(System.Reflection.Emit.MethodBuilder mdBuilder);
-        public void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
+        public abstract void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
-        public void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);
+        public abstract void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);
-        public void SetRaiseMethod(System.Reflection.Emit.MethodBuilder mdBuilder);
+        public abstract void SetRaiseMethod(System.Reflection.Emit.MethodBuilder mdBuilder);
-        public void SetRemoveOnMethod(System.Reflection.Emit.MethodBuilder mdBuilder);
+        public abstract void SetRemoveOnMethod(System.Reflection.Emit.MethodBuilder mdBuilder);
    }
    
-    public sealed partial class FieldBuilder : System.Reflection.FieldInfo
+    public abstract partial class FieldBuilder : System.Reflection.FieldInfo
    {
-        internal FieldBuilder();
+        protected FieldBuilder();
-        public void SetConstant(object? defaultValue);
+        public abstract void SetConstant(object? defaultValue);
-        public void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
+        public abstract void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
-        public void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder)
+        public abstract void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);
-        public void SetOffset(int iOffset);
+        public abstract void SetOffset(int iOffset);
    }
    
-    public sealed partial class GenericTypeParameterBuilder : System.Reflection.TypeInfo
+    public abstract partial class GenericTypeParameterBuilder : System.Reflection.TypeInfo
    {
-        internal GenericTypeParameterBuilder();
+        protected GenericTypeParameterBuilder();
-         public void SetBaseTypeConstraint([System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.All)] System.Type? baseTypeConstraint);
+        public abstract void SetBaseTypeConstraint([System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.All)] System.Type? baseTypeConstraint);
-        public void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
+        public abstract void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
-        public void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);
+        public abstract void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);
-        public void SetGenericParameterAttributes(System.Reflection.GenericParameterAttributes genericParameterAttributes);
+        public abstract void SetGenericParameterAttributes(System.Reflection.GenericParameterAttributes genericParameterAttributes);
-        public void SetInterfaceConstraints(params System.Type[]? interfaceConstraints);
+        public abstract void SetInterfaceConstraints(params System.Type[]? interfaceConstraints);
    }
    
-    public sealed partial class MethodBuilder : System.Reflection.MethodInfo
+    public abstract partial class MethodBuilder : System.Reflection.MethodInfo
    {
-        internal MethodBuilder();
+        protected MethodBuilder();
-        public bool InitLocals { get; set; }
+        public abstract bool InitLocals { get; set; }
-        public System.Reflection.Emit.GenericTypeParameterBuilder[] DefineGenericParameters(params string[] names);
+        public abstract System.Reflection.Emit.GenericTypeParameterBuilder[] DefineGenericParameters(params string[] names);
-        public System.Reflection.Emit.ParameterBuilder DefineParameter(int position, System.Reflection.ParameterAttributes attributes, string? strParamName);
+        public abstract System.Reflection.Emit.ParameterBuilder DefineParameter(int position, System.Reflection.ParameterAttributes attributes, string? strParamName);
-        public System.Reflection.Emit.ILGenerator GetILGenerator();
+        public abstract System.Reflection.Emit.ILGenerator GetILGenerator();
-        public System.Reflection.Emit.ILGenerator GetILGenerator(int size);
+        public abstract System.Reflection.Emit.ILGenerator GetILGenerator(int size);
-        public void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
+        public abstract void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
-        public void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);
+        public abstract void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);
-        public void SetImplementationFlags(System.Reflection.MethodImplAttributes attributes);
+        public abstract void SetImplementationFlags(System.Reflection.MethodImplAttributes attributes);
-        public void SetParameters(params System.Type[] parameterTypes);
+        public abstract void SetParameters(params System.Type[] parameterTypes);
-        public void SetReturnType(System.Type? returnType);
+        public abstract void SetReturnType(System.Type? returnType);
-        public void SetSignature(System.Type? returnType, System.Type[]? returnTypeRequiredCustomModifiers, System.Type[]? returnTypeOptionalCustomModifiers, System.Type[]? parameterTypes, System.Type[][]? parameterTypeRequiredCustomModifiers, System.Type[][]? parameterTypeOptionalCustomModifiers);
+        public abstract void SetSignature(System.Type? returnType, System.Type[]? returnTypeRequiredCustomModifiers, System.Type[]? returnTypeOptionalCustomModifiers, System.Type[]? parameterTypes, System.Type[][]? parameterTypeRequiredCustomModifiers, System.Type[][]? parameterTypeOptionalCustomModifiers);
    }
    
-    public partial class ModuleBuilder : System.Reflection.Module
+    public abstract partial class ModuleBuilder : System.Reflection.Module
    {
-        internal ModuleBuilder();
+        protected ModuleBuilder();
-        public void CreateGlobalFunctions();
+        public abstract void CreateGlobalFunctions();
-        public System.Reflection.Emit.EnumBuilder DefineEnum(string name, System.Reflection.TypeAttributes visibility, System.Type underlyingType);
+        public abstract System.Reflection.Emit.EnumBuilder DefineEnum(string name, System.Reflection.TypeAttributes visibility, System.Type underlyingType);
-        public System.Reflection.Emit.MethodBuilder DefineGlobalMethod(string name, System.Reflection.MethodAttributes attributes, System.Reflection.CallingConventions callingConvention, System.Type? returnType, System.Type[]? requiredReturnTypeCustomModifiers, System.Type[]? optionalReturnTypeCustomModifiers, System.Type[]? parameterTypes, System.Type[][]? requiredParameterTypeCustomModifiers, System.Type[][]? optionalParameterTypeCustomModifiers);
+        public abstract System.Reflection.Emit.MethodBuilder DefineGlobalMethod(string name, System.Reflection.MethodAttributes attributes, System.Reflection.CallingConventions callingConvention, System.Type? returnType, System.Type[]? requiredReturnTypeCustomModifiers, System.Type[]? optionalReturnTypeCustomModifiers, System.Type[]? parameterTypes, System.Type[][]? requiredParameterTypeCustomModifiers, System.Type[][]? optionalParameterTypeCustomModifiers);
-        public System.Reflection.Emit.FieldBuilder DefineInitializedData(string name, byte[] data, System.Reflection.FieldAttributes attributes) ;
+        public abstract System.Reflection.Emit.FieldBuilder DefineInitializedData(string name, byte[] data, System.Reflection.FieldAttributes attributes);
-        public System.Reflection.Emit.MethodBuilder DefinePInvokeMethod(string name, string dllName, string entryName, System.Reflection.MethodAttributes attributes, System.Reflection.CallingConventions callingConvention, System.Type? returnType, System.Type[]? parameterTypes, System.Runtime.InteropServices.CallingConvention nativeCallConv, System.Runtime.InteropServices.CharSet nativeCharSet);
+        public abstract System.Reflection.Emit.MethodBuilder DefinePInvokeMethod(string name, string dllName, string entryName, System.Reflection.MethodAttributes attributes, System.Reflection.CallingConventions callingConvention, System.Type? returnType, System.Type[]? parameterTypes, System.Runtime.InteropServices.CallingConvention nativeCallConv, System.Runtime.InteropServices.CharSet nativeCharSet);
-        public System.Reflection.Emit.TypeBuilder DefineType(string name, System.Reflection.TypeAttributes attr, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.All)] System.Type? parent, System.Reflection.Emit.PackingSize packingSize, int typesize);
+        public abstract System.Reflection.Emit.TypeBuilder DefineType(string name, System.Reflection.TypeAttributes attr, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.All)] System.Type? parent, System.Reflection.Emit.PackingSize packingSize, int typesize);
-        public System.Reflection.Emit.TypeBuilder DefineType(string name, System.Reflection.TypeAttributes attr, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.All)] System.Type? parent, System.Type[]? interfaces);
+        public abstract System.Reflection.Emit.TypeBuilder DefineType(string name, System.Reflection.TypeAttributes attr, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.All)] System.Type? parent, System.Type[]? interfaces);
-        public System.Reflection.Emit.FieldBuilder DefineUninitializedData(string name, int size, System.Reflection.FieldAttributes attributes);
+        public abstract System.Reflection.Emit.FieldBuilder DefineUninitializedData(string name, int size, System.Reflection.FieldAttributes attributes);
-        public System.Reflection.MethodInfo GetArrayMethod(System.Type arrayClass, string methodName, System.Reflection.CallingConventions callingConvention, System.Type? returnType, System.Type[]? parameterTypes);
+        public abstract System.Reflection.MethodInfo GetArrayMethod(System.Type arrayClass, string methodName, System.Reflection.CallingConventions callingConvention, System.Type? returnType, System.Type[]? parameterTypes);
-        public void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
+        public abstract void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
-        public void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);
+        public abstract void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);

// New public APIs: these are existing internal methods used outside of the ModuleBuilder, so needs to make public 
+        public abstract int GetTypeToken(Type type);
+        public abstract int GetMethodToken(MethodInfo method);
+        public abstract int GetFieldToken(FieldInfo field);
+        public abstract int GetConstructorToken(ConstructorInfo con);
+        public abstract int GetSignatureToken(SignatureHelper sigHelper);
+        public abstract int GetStringConstant(string str);
    }
    
-    public sealed partial class PropertyBuilder : System.Reflection.PropertyInfo
+    public abstract partial class PropertyBuilder : System.Reflection.PropertyInfo
    {
-        internal PropertyBuilder();
+        protected PropertyBuilder();
-        public void AddOtherMethod(System.Reflection.Emit.MethodBuilder mdBuilder);
+        public abstract void AddOtherMethod(System.Reflection.Emit.MethodBuilder mdBuilder);
-        public void SetConstant(object? defaultValue);
+        public abstract void SetConstant(object? defaultValue);
-        public void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
+        public abstract void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
-        public void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);
+        public abstract void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);
-        public void SetGetMethod(System.Reflection.Emit.MethodBuilder mdBuilder);
+        public abstract void SetGetMethod(System.Reflection.Emit.MethodBuilder mdBuilder);
-        public void SetSetMethod(System.Reflection.Emit.MethodBuilder mdBuilder);
+        public abstract void SetSetMethod(System.Reflection.Emit.MethodBuilder mdBuilder);
    }
   
-   public sealed partial class TypeBuilder : System.Reflection.TypeInfo
+   public abstract partial class TypeBuilder : System.Reflection.TypeInfo
    {
-        internal TypeBuilder();
+        protected TypeBuilder();
-        public System.Reflection.Emit.PackingSize PackingSize { get; }
+        public abstract System.Reflection.Emit.PackingSize PackingSize { get; }
-        public int Size { get; }
+        public abstract int Size { get; }
-        public void AddInterfaceImplementation([System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.All)] System.Type interfaceType);
+        public abstract void AddInterfaceImplementation([System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.All)] System.Type interfaceType);
-        public System.Reflection.TypeInfo CreateTypeInfo();
+        public abstract System.Reflection.TypeInfo CreateTypeInfo();
-        public System.Reflection.Emit.ConstructorBuilder DefineConstructor(System.Reflection.MethodAttributes attributes, System.Reflection.CallingConventions callingConvention, System.Type[]? parameterTypes, System.Type[][]? requiredCustomModifiers, System.Type[][]? optionalCustomModifiers);
+        public abstract System.Reflection.Emit.ConstructorBuilder DefineConstructor(System.Reflection.MethodAttributes attributes, System.Reflection.CallingConventions callingConvention, System.Type[]? parameterTypes, System.Type[][]? requiredCustomModifiers, System.Type[][]? optionalCustomModifiers);
-        public System.Reflection.Emit.ConstructorBuilder DefineDefaultConstructor(System.Reflection.MethodAttributes attributes);
+        public abstract System.Reflection.Emit.ConstructorBuilder DefineDefaultConstructor(System.Reflection.MethodAttributes attributes);
-        public System.Reflection.Emit.EventBuilder DefineEvent(string name, System.Reflection.EventAttributes attributes, System.Type eventtype);
+        public abstract System.Reflection.Emit.EventBuilder DefineEvent(string name, System.Reflection.EventAttributes attributes, System.Type eventtype);
-        public System.Reflection.Emit.FieldBuilder DefineField(string fieldName, System.Type type, System.Type[]? requiredCustomModifiers, System.Type[]? optionalCustomModifiers, System.Reflection.FieldAttributes attributes) { throw null; }
+        public abstract System.Reflection.Emit.FieldBuilder DefineField(string fieldName, System.Type type, System.Type[]? requiredCustomModifiers, System.Type[]? optionalCustomModifiers, System.Reflection.FieldAttributes attributes);
-        public System.Reflection.Emit.GenericTypeParameterBuilder[] DefineGenericParameters(params string[] names);
+        public abstract System.Reflection.Emit.GenericTypeParameterBuilder[] DefineGenericParameters(params string[] names);
-        public System.Reflection.Emit.FieldBuilder DefineInitializedData(string name, byte[] data, System.Reflection.FieldAttributes attributes);
+        public abstract System.Reflection.Emit.FieldBuilder DefineInitializedData(string name, byte[] data, System.Reflection.FieldAttributes attributes);
-        public System.Reflection.Emit.MethodBuilder DefineMethod(string name, System.Reflection.MethodAttributes attributes, System.Reflection.CallingConventions callingConvention, System.Type? returnType, System.Type[]? returnTypeRequiredCustomModifiers, System.Type[]? returnTypeOptionalCustomModifiers, System.Type[]? parameterTypes, System.Type[][]? parameterTypeRequiredCustomModifiers, System.Type[][]? parameterTypeOptionalCustomModifiers);
+        public abstract System.Reflection.Emit.MethodBuilder DefineMethod(string name, System.Reflection.MethodAttributes attributes, System.Reflection.CallingConventions callingConvention, System.Type? returnType, System.Type[]? returnTypeRequiredCustomModifiers, System.Type[]? returnTypeOptionalCustomModifiers, System.Type[]? parameterTypes, System.Type[][]? parameterTypeRequiredCustomModifiers, System.Type[][]? parameterTypeOptionalCustomModifiers);
-        public void DefineMethodOverride(System.Reflection.MethodInfo methodInfoBody, System.Reflection.MethodInfo methodInfoDeclaration);
+        public abstract void DefineMethodOverride(System.Reflection.MethodInfo methodInfoBody, System.Reflection.MethodInfo methodInfoDeclaration);
-        public System.Reflection.Emit.TypeBuilder DefineNestedType(string name, System.Reflection.TypeAttributes attr, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.All)] System.Type? parent, System.Reflection.Emit.PackingSize packSize, int typeSize);
+        public abstract System.Reflection.Emit.TypeBuilder DefineNestedType(string name, System.Reflection.TypeAttributes attr, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.All)] System.Type? parent, System.Reflection.Emit.PackingSize packSize, int typeSize);
-        public System.Reflection.Emit.TypeBuilder DefineNestedType(string name, System.Reflection.TypeAttributes attr, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.All)] System.Type? parent, System.Type[]? interfaces);
+        public abstract System.Reflection.Emit.TypeBuilder DefineNestedType(string name, System.Reflection.TypeAttributes attr, [System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.All)] System.Type? parent, System.Type[]? interfaces);
-        public System.Reflection.Emit.MethodBuilder DefinePInvokeMethod(string name, string dllName, string entryName, System.Reflection.MethodAttributes attributes, System.Reflection.CallingConventions callingConvention, System.Type? returnType, System.Type[]? returnTypeRequiredCustomModifiers, System.Type[]? returnTypeOptionalCustomModifiers, System.Type[]? parameterTypes, System.Type[][]? parameterTypeRequiredCustomModifiers, System.Type[][]? parameterTypeOptionalCustomModifiers, System.Runtime.InteropServices.CallingConvention nativeCallConv, System.Runtime.InteropServices.CharSet nativeCharSet);
+        public abstract System.Reflection.Emit.MethodBuilder DefinePInvokeMethod(string name, string dllName, string entryName, System.Reflection.MethodAttributes attributes, System.Reflection.CallingConventions callingConvention, System.Type? returnType, System.Type[]? returnTypeRequiredCustomModifiers, System.Type[]? returnTypeOptionalCustomModifiers, System.Type[]? parameterTypes, System.Type[][]? parameterTypeRequiredCustomModifiers, System.Type[][]? parameterTypeOptionalCustomModifiers, System.Runtime.InteropServices.CallingConvention nativeCallConv, System.Runtime.InteropServices.CharSet nativeCharSet);
-        public System.Reflection.Emit.PropertyBuilder DefineProperty(string name, System.Reflection.PropertyAttributes attributes, System.Reflection.CallingConventions callingConvention, System.Type returnType, System.Type[]? returnTypeRequiredCustomModifiers, System.Type[]? returnTypeOptionalCustomModifiers, System.Type[]? parameterTypes, System.Type[][]? parameterTypeRequiredCustomModifiers, System.Type[][]? parameterTypeOptionalCustomModifiers);
+        public abstract System.Reflection.Emit.PropertyBuilder DefineProperty(string name, System.Reflection.PropertyAttributes attributes, System.Reflection.CallingConventions callingConvention, System.Type returnType, System.Type[]? returnTypeRequiredCustomModifiers, System.Type[]? returnTypeOptionalCustomModifiers, System.Type[]? parameterTypes, System.Type[][]? parameterTypeRequiredCustomModifiers, System.Type[][]? parameterTypeOptionalCustomModifiers);
-        public System.Reflection.Emit.ConstructorBuilder DefineTypeInitializer();
+        public abstract System.Reflection.Emit.ConstructorBuilder DefineTypeInitializer();
-        public System.Reflection.Emit.FieldBuilder DefineUninitializedData(string name, int size, System.Reflection.FieldAttributes attributes);
+        public abstract System.Reflection.Emit.FieldBuilder DefineUninitializedData(string name, int size, System.Reflection.FieldAttributes attributes);
-        public bool IsCreated();
+        public abstract bool IsCreated();
-        public void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
+        public abstract void SetCustomAttribute(System.Reflection.ConstructorInfo con, byte[] binaryAttribute);
-        public void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);
+        public abstract void SetCustomAttribute(System.Reflection.Emit.CustomAttributeBuilder customBuilder);
-        public void SetParent([System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.All)] System.Type? parent);
+        public abstract void SetParent([System.Diagnostics.CodeAnalysis.DynamicallyAccessedMembersAttribute(System.Diagnostics.CodeAnalysis.DynamicallyAccessedMemberTypes.All)] System.Type? parent);
    }
}