simple struct.il

.class public auto ansi abstract sealed Program
    extends [mscorlib]System.Object
{
    .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = (
        01 00 07 00 00 00 00 00
    )
    .class nested public auto auto sealed serializable beforefieldinit DU
        extends [mscorlib]System.ValueType
        implements class [mscorlib]System.IEquatable`1<valuetype Program/DU>,
                   [mscorlib]System.Collections.IStructuralEquatable,
                   class [mscorlib]System.IComparable`1<valuetype Program/DU>,
                   [mscorlib]System.IComparable,
                   [mscorlib]System.Collections.IStructuralComparable
    {
        .custom instance void [FSharp.Core]Microsoft.FSharp.Core.StructAttribute::.ctor() = (
            01 00 00 00
        )
        .custom instance void [mscorlib]System.Diagnostics.DebuggerDisplayAttribute::.ctor(string) = (
            01 00 15 7b 5f 5f 44 65 62 75 67 44 69 73 70 6c
            61 79 28 29 2c 6e 71 7d 00 00
        )
        .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags) = (
            01 00 01 00 00 00 00 00
        )
        .property instance int32 b()
        {
            .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags,  int32,  int32) = (
                01 00 04 00 00 00 00 00 00 00 00 00 00 00 00 00
            )
            .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = (
                01 00 00 00
            )
            .custom instance void [mscorlib]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = (
                01 00 00 00
            )
            .get instance int32 Program/DU::get_b()
            {
                .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = (
                    01 00 00 00
                )
                .custom instance void [mscorlib]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = (
                    01 00 00 00
                )
                IL_0000: ldarg.0
                IL_0001: ldfld int32 Program/DU::_b
                IL_0006: ret
            }
        }

        .property instance string d()
        {
            .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags,  int32,  int32) = (
                01 00 04 00 00 00 01 00 00 00 00 00 00 00 00 00
            )
            .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = (
                01 00 00 00
            )
            .custom instance void [mscorlib]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = (
                01 00 00 00
            )
            .get instance string Program/DU::get_d()
            {
                .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = (
                    01 00 00 00
                )
                .custom instance void [mscorlib]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = (
                    01 00 00 00
                )
                IL_0000: ldarg.0
                IL_0001: ldfld string Program/DU::_d
                IL_0006: ret
            }
        }

        .property instance bool IsA()
        {
            .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = (
                01 00 00 00
            )
            .custom instance void [mscorlib]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = (
                01 00 00 00
            )
            .custom instance void [mscorlib]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [mscorlib]System.Diagnostics.DebuggerBrowsableState) = (
                01 00 00 00 00 00 00 00
            )
            .get instance bool Program/DU::get_IsA()
            {
                .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = (
                    01 00 00 00
                )
                .custom instance void [mscorlib]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = (
                    01 00 00 00
                )
                IL_0000: ldarg.0
                IL_0001: call instance int32 Program/DU::get_Tag()
                IL_0006: ldc.i4.0
                IL_0007: ceq
                IL_0009: ret
            }
        }

        .property instance bool IsC()
        {
            .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = (
                01 00 00 00
            )
            .custom instance void [mscorlib]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = (
                01 00 00 00
            )
            .custom instance void [mscorlib]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [mscorlib]System.Diagnostics.DebuggerBrowsableState) = (
                01 00 00 00 00 00 00 00
            )
            .get instance bool Program/DU::get_IsC()
            {
                .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = (
                    01 00 00 00
                )
                .custom instance void [mscorlib]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = (
                    01 00 00 00
                )
                IL_0000: ldarg.0
                IL_0001: call instance int32 Program/DU::get_Tag()
                IL_0006: ldc.i4.1
                IL_0007: ceq
                IL_0009: ret
            }
        }

        .property instance int32 Tag()
        {
            .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = (
                01 00 00 00
            )
            .custom instance void [mscorlib]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = (
                01 00 00 00
            )
            .custom instance void [mscorlib]System.Diagnostics.DebuggerBrowsableAttribute::.ctor(valuetype [mscorlib]System.Diagnostics.DebuggerBrowsableState) = (
                01 00 00 00 00 00 00 00
            )
            .get instance int32 Program/DU::get_Tag()
            {
                .custom instance void [mscorlib]System.Runtime.CompilerServices.CompilerGeneratedAttribute::.ctor() = (
                    01 00 00 00
                )
                .custom instance void [mscorlib]System.Diagnostics.DebuggerNonUserCodeAttribute::.ctor() = (
                    01 00 00 00
                )
                IL_0000: ldarg.0
                IL_0001: ldfld int32 Program/DU::_tag
                IL_0006: ret
            }
        }

        .method public static valuetype Program/DU NewA (
                int32 _b
            ) cil managed 
        {
            .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags,  int32) = (
                01 00 08 00 00 00 00 00 00 00 00 00
            )
            IL_0000: ldarg.0
            IL_0001: ldc.i4.0
            IL_0002: newobj instance void Program/DU::.ctor(int32,  int32)
            IL_0007: ret
        }

        .method public static valuetype Program/DU NewC (
                string _d
            ) cil managed 
        {
            .custom instance void [FSharp.Core]Microsoft.FSharp.Core.CompilationMappingAttribute::.ctor(valuetype [FSharp.Core]Microsoft.FSharp.Core.SourceConstructFlags,  int32) = (
                01 00 08 00 00 00 01 00 00 00 00 00
            )
            IL_0000: ldarg.0
            IL_0001: ldc.i4.1
            IL_0002: newobj instance void Program/DU::.ctor(string,  int32)
            IL_0007: ret
        }

        .class nested public auto ansi abstract sealed Tags
            extends [mscorlib]System.Object
        {
            .field public static literal int32 A = int32(0)

            .field public static literal int32 C = int32(1)
        }
    }
}