VladimirReshetnikov

public static string RemoveSubstring(string str, string substr)
{
    if (str == null || substr == null)
    {
        return str;
    }

    int index = str.IndexOf(substr);
    
    if (index == -1)

VladimirReshetnikov

class A { bool x = (0 as System.Nullable<int>) < 0; }

VladimirReshetnikov

using System;

static class Program
{
    static void Main()
    {
        Action action = ((object)0).Foo;
        if (action.Target != null && action.Method.IsStatic)
        {
            Console.WriteLine(action.Target.GetType().IsValueType);

VladimirReshetnikov

using System;
using System.Reflection;

class Program
{
    static void Main()
    {
        var allocate = typeof (RuntimeTypeHandle).GetMethod("Allocate", (BindingFlags) 40);
        var open = allocate.Invoke(null, new[] {typeof (C<>.E)});
        Console.WriteLine(open.GetType());

VladimirReshetnikov

using System;
using System.Collections.Generic;
using System.Reflection;

class Program
{
    static void Main()
    {
        var allocate = typeof(RuntimeTypeHandle).GetMethod("Allocate", (BindingFlags)40);
        var open = allocate.Invoke(null, new[] { typeof(IList<>) });

VladimirReshetnikov

class Program
{
    // What argument do you need to provide to this method so that it returns true?
    public static bool AreYouNuts<T>(T[] array)
    {
        if (array == null || array.Length == 0)
            return false;

        var local = (T[]) array.Clone();

VladimirReshetnikov

#if false
/*
#if false
//*/
#else

// ReSharper thinks this is a real class declaration, but it is a skipped-section
class C
{
    

VladimirReshetnikov

using System;
using N; // This using directive is unused, but cannot be simply removed

static class C
{
    static void Ex(this string x) { }
    static void Foo(Action<string> x, int y) { }
    static void Foo(Action<string> x, string y) { }
    static void Foo(Action<string> x, object y) { }
    static void Foo(Action<int> x, int y) { }

VladimirReshetnikov

using System;

class Program
{
    static void Main()
    {
        Array a = Array.CreateInstance(typeof(int), new[]{1}, new[]{1});
        Console.WriteLine(a is int[]); // False
        Console.WriteLine(a.GetType()); // System.Int32[*]
    }

VladimirReshetnikov

using System;

unsafe struct S
{
    public void* ptr;
    public object obj; 

    static void Main()
    {
        S s = default(S);