мерси, сега стана, но ми даде някаква грешка май: 

C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets(1097,5): warning MSB3644: The reference assemblies for framework ".NETFramework,Version=v4.5.2" were not found. To resolve this, install the SDK or Targeting Pack for this framework version or retarget your application to a version of the framework for which you have the SDK or Targeting Pack installed. Note that assemblies will be resolved from the Global Assembly Cache (GAC) and will be used in place of reference assemblies. Therefore your assembly may not be correctly targeted for the framework you intend. [C:\Windows\TEMP\ehs2pjz5.rb3\Capitalism\Capitalism.csproj]
C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets(1819,5): warning MSB3270: There was a mismatch between the processor architecture of the project being built "MSIL" and the processor architecture of the reference "C:\Windows\Microsoft.NET\Framework\v4.0.30319\\mscorlib.dll", "x86". This mismatch may cause runtime failures. Please consider changing the targeted processor architecture of your project through the Configuration Manager so as to align the processor architectures between your project and references, or take a dependency on references with a processor architecture that matches the targeted processor architecture of your project. [C:\Windows\TEMP\ehs2pjz5.rb3\Capitalism\Capitalism.csproj]
C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets(1819,5): warning MSB3270: There was a mismatch between the processor architecture of the project being built "MSIL" and the processor architecture of the reference "System.Data", "AMD64". This mismatch may cause runtime failures. Please consider changing the targeted processor architecture of your project through the Configuration Manager so as to align the processor architectures between your project and references, or take a dependency on references with a processor architecture that matches the targeted processor architecture of your project. [C:\Windows\TEMP\ehs2pjz5.rb3\Capitalism\Capitalism.csproj]

Run-ни си проекта през visual studio compile-ни проекта и като го ръннеш, тея файлове ще се генерират пак, не съм запознат с проблема ти, но ти казва, че нямаш .NetFramework 4.5.2 пробвай да го repair-неш или го инсталлни на ново.

Другия или същия проблем не знам кое от двете е че ми дава уж всичко ми е както трябва, а ми дава грешен резултат:

Expected output:

C (1707.40)
    Root1 (407.40)
        Root1-1 (127.40)
(C)
Dragan Draganin (1000.00)
Koicho Stoichov (150.00)
Nikolay Stoichov (150.00)
    (Root1)
    Pesho Stoichov (140.00)
    Ivanka Stoichova (140.00)
        (Root1-1)
        Draganka Stoichova (127.40)
C (1707.40)
    Root1 (407.40)
        Root1-1 (127.40)
C (1707.40)
    Root1 (407.40)
        Root1-1 (127.40)
(C)
Dragan Draganin (3000.00)
Koicho Stoichov (450.00)
Nikolay Stoichov (450.00)
    (Root1)
    Pesho Stoichov (420.00)
    Ivanka Stoichova (420.00)
        (Root1-1)
        Draganka Stoichova (382.20)

Your output:

C (1707.40)
    Root1 (407.40)
        Root1-1 (127.40)
(C)
Dragan Draganin (1000.00)
Koicho Stoichov (150.00)
Nikolay Stoichov (150.00)
    (Root1)
    Pesho Stoichov (140.00)
    Ivanka Stoichova (140.00)
        (Root1-1)
        Draganka Stoichova (127.40)

C (1707.40)
    Root1 (407.40)
        Root1-1 (127.40)
C (1707.40)
    Root1 (407.40)
        Root1-1 (127.40)
(C)
Dragan Draganin (3000.00)
Koicho Stoichov (450.00)
Nikolay Stoichov (450.00)
    (Root1)
    Pesho Stoichov (420.00)
    Ivanka Stoichova (420.00)
        (Root1-1)
        Draganka Stoichova (382.20)

което на мен ми изглежда 1:1 и пак ми дава, че output-a ми е грешен...

Това с warning-ите при компилация може да го игнорираш; щом ти дава изход всичко е ок. 

Когато го изпратиш към Judge- и като ти каже колко точки имаш от дясно цъкни на Details, като ти се отвори прозореца, има expected output и от дясно твоя output сравни ги, предполагам, че някъде се разминава, очаквания output с твоя, не съм довършил задачата и не мога да ти помогна.

В твоя аутпут след тези два реда:

 (Root1-1)
        Draganka Stoichova (127.40)

 имаш още един празен.

може ли някой да ми подскаже как мога да го направя като е в рекурсия?

private void DisplayDepartment(Department department, StringBuilder output, int departmentLevel)
        {
            output.AppendFormat("{0}({1})",new string(' ', departmentLevel * 4), department.Name).AppendLine();
            foreach (var employee in department.Employees)
            {
                output.AppendFormat("{0}{1} {2} ({3:F2})",new string(' ', 4 * departmentLevel), employee.FirstName, employee.LastName, database.TotalSalaries[employee]).AppendLine();
            }
            foreach (var subDepartment in department.SubDepartments)
            {
                DisplayDepartment(subDepartment, output, departmentLevel + 1);
            }
        }

Ами мен стрингбилдъра ми изглежда ОК. Да не би после да го принтираш с Console.WriteLine(), който слага нов ред след края на текста?

https://www.diffchecker.com/q8fulnew

Здрасти Митко, може би си добавил някой ненужен спейс след надписите и затова не ти го признава judge-a

C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets(1097,5): warning MSB3644: The reference assemblies for framework ".NETFramework,Version=v4.5.2" were not found. To resolve this, install the SDK or Targeting Pack for this framework version or retarget your application to a version of the framework for which you have the SDK or Targeting Pack installed. Note that assemblies will be resolved from the Global Assembly Cache (GAC) and will be used in place of reference assemblies. Therefore your assembly may not be correctly targeted for the framework you intend. [C:\Windows\TEMP\jzgvrh2w.gz0\Capitalism\Capitalism.csproj]
C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets(1819,5): warning MSB3270: There was a mismatch between the processor architecture of the project being built "MSIL" and the processor architecture of the reference "C:\Windows\Microsoft.NET\Framework\v4.0.30319\\mscorlib.dll", "x86". This mismatch may cause runtime failures. Please consider changing the targeted processor architecture of your project through the Configuration Manager so as to align the processor architectures between your project and references, or take a dependency on references with a processor architecture that matches the targeted processor architecture of your project. [C:\Windows\TEMP\jzgvrh2w.gz0\Capitalism\Capitalism.csproj]
C:\Program Files (x86)\MSBuild\14.0\bin\Microsoft.Common.CurrentVersion.targets(1819,5): warning MSB3270: There was a mismatch between the processor architecture of the project being built "MSIL" and the processor architecture of the reference "System.Data", "AMD64". This mismatch may cause runtime failures. Please consider changing the targeted processor architecture of your project through the Configuration Manager so as to align the processor architectures between your project and references, or take a dependency on references with a processor architecture that matches the targeted processor architecture of your project. [C:\Windows\TEMP\jzgvrh2w.gz0\Capitalism\Capitalism.csproj]

На мен ми дава същия проблем. Ако си успял да го преодолееш, би ли споделил? 

Това не са warning-и, за които трябва да се притеснявате. Появяват се откакто в Judge се поддържа C# 6.

Това, за което трябва да следите, са грешки, които не позволяват програмата ви да се компилира изобщо, или предупреждения, които произлизат от сорс кода. Например скриване на наследени членове чрез деклариране на нови такива в клас наследник вместо овъррайдване (което чупи поломорфизма и обикновено води до грешки в отговорите).

Royal, като видях твоето решение и се отказах да мъча на Данчо решението да го подкарам. Данчо е мн добър спор няма ама не качва решенията си в judge системата. Е, верно някой ще каже, че не ги е качил, защото промени условието на задачата в движение, и това е така... мерси на всички за отговорите! бяха ми полезни и успех на изпита!