error CS0234: The type or namespace name 'VisualStudio' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?

Question

I am using Visual Studio 2015 professional edition to run some test cases on my local machine. I am able to build the solution & run test cases locally.

When I build my application on TeamCity server (build agent is also hosted on team city server), I am getting following errors:

Controllers\OneControllerTest.cs(5, 17): error CS0234: The type or namespace name 'VisualStudio' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?)
Controllers\LandingControllerTest.cs(2, 17): error CS0234: The type or namespace name 'VisualStudio' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?)
Controllers\TwoControllerTest.cs(5, 17): error CS0234: The type or namespace name 'VisualStudio' does not exist in the namespace 'Microsoft' (are you missing an assembly reference?)
Controllers\OneControllerTest.cs(15, 10): error CS0118: 'My_api.Test.OneControllerTest.TestInitialize()' is a 'method' but is used like a 'type' 
Controllers\OneControllerTest.cs(15, 10): error CS0246: The type or namespace name 'TestInitializeAttribute' could not be found (are you missing a using directive or an assembly reference?)
Controllers\OneControllerTest.cs(22, 10): error CS0246: The type or namespace name 'TestMethod' could not be found (are you missing a using directive or an assembly reference?)
Controllers\OneControllerTest.cs(22, 10): error CS0246: The type or namespace name 'TestMethodAttribute' could not be found (are you missing a using directive or an assembly reference?)
Controllers\OneControllerTest.cs(39, 10): error CS0246: The type or namespace name 'TestMethod' could not be found (are you missing a using directive or an assembly reference?)
Controllers\OneControllerTest.cs(39, 10): error CS0246: The type or namespace name 'TestMethodAttribute' could not be found (are you missing a using directive or an assembly reference?)
Controllers\OneControllerTest.cs(40, 10): error CS0246: The type or namespace name 'ExpectedException' could not be found (are you missing a using directive or an assembly reference?)
Controllers\OneControllerTest.cs(40, 10): error CS0246: The type or namespace name 'ExpectedExceptionAttribute' could not be found (are you missing a using directive or an assembly reference?)
Controllers\OneControllerTest.cs(11, 6): error CS0246: The type or namespace name 'TestClass' could not be found (are you missing a using directive or an assembly reference?)
Controllers\OneControllerTest.cs(11, 6): error CS0246: The type or namespace name 'TestClassAttribute' could not be found (are you missing a using directive or an assembly reference?)
Controllers\LandingControllerTest.cs(10, 10): error CS0246: The type or namespace name 'TestMethod' could not be found (are you missing a using directive or an assembly reference?)
Controllers\LandingControllerTest.cs(10, 10): error CS0246: The type or namespace name 'TestMethodAttribute' could not be found (are you missing a using directive or an assembly reference?)
Controllers\LandingControllerTest.cs(7, 6): error CS0246: The type or namespace name 'TestClass' could not be found (are you missing a using directive or an assembly reference?)
Controllers\LandingControllerTest.cs(7, 6): error CS0246: The type or namespace name 'TestClassAttribute' could not be found (are you missing a using directive or an assembly reference?)
Controllers\TwoControllerTest.cs(18, 10): error CS0118: 'My_api.Test.Controllers.TwoControllerTest.TestInitialize()' is a 'method' but is used like a 'type'
Controllers\TwoControllerTest.cs(18, 10): error CS0246: The type or namespace name 'TestInitializeAttribute' could not be found (are you missing a using directive or an assembly reference?)
Controllers\TwoControllerTest.cs(44, 10): error CS0246: The type or namespace name 'TestMethod' could not be found (are you missing a using directive or an assembly reference?)
Controllers\TwoControllerTest.cs(44, 10): error CS0246: The type or namespace name 'TestMethodAttribute' could not be found (are you missing a using directive or an assembly reference?)
Controllers\TwoControllerTest.cs(60, 10): error CS0246: The type or namespace name 'TestMethod' could not be found (are you missing a using directive or an assembly reference?)
Controllers\TwoControllerTest.cs(60, 10): error CS0246: The type or namespace name 'TestMethodAttribute' could not be found (are you missing a using directive or an assembly reference?)
Controllers\TwoControllerTest.cs(13, 6): error CS0246: The type or namespace name 'TestClass' could not be found (are you missing a using directive or an assembly reference?)
Controllers\TwoControllerTest.cs(13, 6): error CS0246: The type or namespace name 'TestClassAttribute' could not be found (are you missing a using directive or an assembly reference?)

I am using following nuget packages:

<packages>
  <package id="Castle.Core" version="4.2.1" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebApi.Core" version="5.2.3" targetFramework="net45" />
  <package id="Microsoft.UnitTestFramework.Extensions" version="2.0.0" targetFramework="net45" />
  <package id="Moq" version="4.8.0" targetFramework="net45" />
  <package id="MSTest.TestAdapter" version="1.3.2" targetFramework="net45" />
  <package id="MSTest.TestFramework" version="1.3.2" targetFramework="net45" />
  <package id="Newtonsoft.Json" version="9.0.1" targetFramework="net45" />
  <package id="System.Diagnostics.Contracts" version="4.0.1" targetFramework="net45" />
  <package id="System.Threading.Tasks.Extensions" version="4.4.0" targetFramework="net45" />
  <package id="System.ValueTuple" version="4.4.0" targetFramework="net45" />
  <package id="Unity.AspNet.WebApi" version="4.0.1" targetFramework="net452" />
</packages>

My team city server box has .net framework 4.0 installed on it. I am trying to avoid installing Visual Studio on team city server,

What could be the reason for this error?

Answer 1

For VS 2019, I had to change the Target Framework.

From target framework 4 to 4.6(last version)

Answer 2

You need to install the visual studio to run the Unit tests on TeamCity build server. According to Team City documentation,

The appropriate Microsoft Visual Studio edition installed on the build agent is required.

See https://confluence.jetbrains.com/display/TCD10/MSTest+Support