C# REPL outside Visual Studio

Question

F# has a REPL (read–eval–print loop) F# Interactive, C:\\Program Files (x86)\\Microsoft F#\\v4.0\\Fsi.exe.

I understand C# now has its own interactive REPL,

Answer 1

How about scriptcs: http://scriptcs.net/?

There is a REPL and you even get the power of NuGet.

Answer 2

use powershell find csi.exe:

PS > Get-ChildItem "C:\Program Files (x86)\" -Recurse | Where-Object Name -CMatch "csi.exe"

below is my output:

    Directory: C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\MSBuild\15.0\Bin\Roslyn


Mode                LastWriteTime         Length Name                                                                                                                        
----                -------------         ------ ----                                                                                                                        
-a----        12/9/2018   6:42 PM          15712 csi.exe                                                                                                                     
-a----        12/9/2018   6:42 PM           8482 csi.exe.config                                                                                                              


    Directory: C:\Program Files (x86)\Microsoft Visual Studio\Shared\Packages\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.2.0.0\tools\Roslyn45


Mode                LastWriteTime         Length Name                                                                                                                        
----                -------------         ------ ----                                                                                                                        
-a----        5/24/2018   1:38 PM          13680 csi.exe                                                                                                                     


    Directory: C:\Program Files (x86)\Microsoft Visual Studio\Shared\Packages\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.2.0.0\tools\RoslynLatest


Mode                LastWriteTime         Length Name                                                                                                                        
----                -------------         ------ ----                                                                                                                        
-a----        5/24/2018   1:38 PM          15280 csi.exe                                                                                                                     
-a----        5/24/2018   1:38 PM           8816 csi.exe.config                                                                                                              


    Directory: C:\Program Files (x86)\Microsoft Visual Studio\Shared\Packages\Microsoft.Net.Compilers.1.3.2\tools


Mode                LastWriteTime         Length Name                                                                                                                        
----                -------------         ------ ----                                                                                                                        
-a----        6/27/2016   2:50 PM          13680 csi.exe                                                                                                                     


    Directory: C:\Program Files (x86)\Microsoft Visual Studio\Shared\Packages\Microsoft.Net.Compilers.2.0.1\tools


Mode                LastWriteTime         Length Name                                                                                                                        
----                -------------         ------ ----                                                                                                                        
-a----         3/7/2017  10:56 AM          14192 csi.exe                                                                                                                     
-a----         3/7/2017  10:56 AM           7905 csi.exe.config                                                                                                              


    Directory: C:\Program Files (x86)\Microsoft Visual Studio\Shared\Packages\Microsoft.Net.Compilers.2.1.0\tools


Mode                LastWriteTime         Length Name                                                                                                                        
----                -------------         ------ ----                                                                                                                        
-a----        4/13/2017   3:47 PM          14192 csi.exe                                                                                                                     
-a----        4/13/2017   3:47 PM           8006 csi.exe.config                                                                                                              


    Directory: C:\Program Files (x86)\Microsoft Visual Studio\Shared\Packages\Microsoft.Net.Compilers.2.4.0\tools


Mode                LastWriteTime         Length Name                                                                                                                        
----                -------------         ------ ----                                                                                                                        
-a----        9/21/2017  11:42 PM          15312 csi.exe                                                                                                                     
-a----        9/21/2017  11:42 PM           8816 csi.exe.config                                                                                                              


    Directory: C:\Program Files (x86)\Microsoft Visual Studio\Shared\Packages\Microsoft.Net.Compilers.2.6.1\tools


Mode                LastWriteTime         Length Name                                                                                                                        
----                -------------         ------ ----                                                                                                                        
-a----       12/13/2017  10:09 PM          16296 csi.exe                                                                                                                     
-a----       12/13/2017  10:09 PM           8816 csi.exe.config