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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Bug: Add-Type needs write-access when compiling from source","articleBody":"\u003c!--\r\nIf it is a bug report:\r\n- make sure you are able to repro it on the latest released version. \r\nYou can install the latest version from https://github.com/PowerShell/PowerShell/releases\r\n- Search the existing issues.\r\n- Refer to the [FAQ](https://github.com/PowerShell/PowerShell/blob/master/docs/FAQ.md).\r\n- Refer to the [known issues](https://docs.microsoft.com/powershell/scripting/whats-new/known-issues-ps6?view=powershell-6).\r\n- Fill out the following repro template:\r\n\r\nIf it's not a bug, please remove the template and elaborate the issue in your own words.\r\n--\u003e\r\n\r\nI was curious to find [this reddit post](https://www.reddit.com/r/PowerShell/comments/9kj7w3/addtype_path_in_powershell_61_requires_write/) describing how `Add-Type -Path ./path/to/sourcecode.cs` fails with `Access to the path './path/to/sourcecode.cs' is denied` even though the process owner has read access to the file. \r\n\r\nUpon granting _write_ access to the file, the issue resolves.\r\n\r\nSteps to reproduce\r\n------------------\r\nI've only tested this on Windows 10:\r\n```powershell\r\n# Create empty source file\r\n$srcFile = Get-Item $([System.IO.Path]::GetTempFileName()) |Rename-Item -NewName {$_.BaseName + '.cs'} -PassThru\r\n# Write source code to file\r\n@'\r\nusing System;\r\nnamespace TestAddType {\r\n  public class TestClass {}\r\n}\r\n'@ |Set-Content $srcFile -Encoding UTF8\r\n# Mark source file ReadOnly\r\n$srcFile.Attributes += 'ReadOnly'\r\n# Attempt to compile from source\r\nAdd-Type -Path $srcFile.FullName\r\n# Output new type literal\r\n[TestAddType.TestClass]\r\n```\r\n\r\nExpected behavior\r\n-----------------\r\n\r\n```none\r\nIsPublic IsSerial Name                                     BaseType\r\n-------- -------- ----                                     --------\r\nTrue     False    TestClass                                System.Object\r\n```\r\n\r\nActual behavior\r\n---------------\r\n\r\n```none\r\nAdd-Type : Access to the path 'C:\\Users\\iisresetme\\AppData\\Local\\Temp\\tmp2A59.cs' is denied.\r\nAt line:1 char:1\r\n+ Add-Type -Path $srcFile.FullName\r\n+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\r\n+ CategoryInfo          : NotSpecified: (:) [Add-Type], UnauthorizedAccessException\r\n+ FullyQualifiedErrorId : System.UnauthorizedAccessException,Microsoft.PowerShell.Commands.AddTypeCommand\r\n```\r\n\r\nEnvironment data\r\n----------------\r\n\r\n\u003c!-- provide the output of $PSVersionTable --\u003e\r\n\r\n```powershell\r\n\u003e $PSVersionTable\r\n\r\nName                           Value\r\n----                           -----\r\nPSVersion                      6.1.0\r\nPSEdition                      Core\r\nGitCommitId                    6.1.0-57-g0f0c46dfe51440470b86f67b258e14aea32fa0aa\r\nOS                             Microsoft Windows 10.0.17134 \r\nPlatform                       Win32NT\r\nPSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}\r\nPSRemotingProtocolVersion      2.3\r\nSerializationVersion           1.1.0.1\r\nWSManStackVersion              3.0\r\n```\r\n","author":{"url":"https://github.com/IISResetMe","@type":"Person","name":"IISResetMe"},"datePublished":"2018-10-01T20:39:48.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/7914/PowerShell/issues/7914"}