René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Invoke-RestMethod doesn't include automatic ContentType value when not using POST method","articleBody":"### Prerequisites\r\n\r\n- [X] Write a descriptive title.\r\n- [X] Make sure you are able to repro it on the [latest released version](https://github.com/PowerShell/PowerShell/releases)\r\n- [X] Search the existing issues.\r\n- [X] Refer to the [FAQ](https://github.com/PowerShell/PowerShell/blob/master/docs/FAQ.md).\r\n- [X] Refer to [Differences between Windows PowerShell 5.1 and PowerShell](https://docs.microsoft.com/powershell/scripting/whats-new/differences-from-windows-powershell).\r\n\r\n### Steps to reproduce\r\n\r\nWhen using a POST, ContentType is automatically set to `application/x-www-form-urlencoded`\r\n```\r\n invoke-restmethod https://webhook.site/6a5097af-3644-4462-9d92-d910088d2f4d -Method POST -Body @{ Test = \"test\" }\r\n```\r\n\r\nWhen using other methods, it is not. It is blank. \r\n\r\n```\r\n invoke-restmethod https://webhook.site/6a5097af-3644-4462-9d92-d910088d2f4d -Method PUT -Body @{ Test = \"test\" }\r\n```\r\n\r\n![image](https://user-images.githubusercontent.com/1256531/139143331-e82931e0-d02e-4c7a-b3c8-c436d0565e3a.png)\r\n\r\n\r\n### Expected behavior\r\n\r\n```console\r\nI would expect that the content type would default to form encoded for all request methods (or at least for PUT). \r\n```\r\n\r\n\r\n### Actual behavior\r\n\r\n```console\r\nIt is only set to form encoded for POST.\r\n```\r\n\r\n\r\n### Error details\r\n\r\n```console\r\nNo errors.\r\n```\r\n\r\n\r\n### Environment data\r\n\r\n```powershell\r\nName                           Value\r\n----                           -----\r\nPSVersion                      7.2.0-rc.1\r\nPSEdition                      Core\r\nGitCommitId                    7.2.0-rc.1\r\nOS                             Microsoft Windows 10.0.22000\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```\r\n\r\n\r\n### Visuals\r\n\r\n_No response_","author":{"url":"https://github.com/adamdriscoll","@type":"Person","name":"adamdriscoll"},"datePublished":"2021-10-27T20:39:04.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":10},"url":"https://github.com/16318/PowerShell/issues/16318"}