PowerShell - RestMethod Code snippet doesn’t work

I use PowerShell - RestMethod Code Snippet to get PoserShell code.

But it doesn’t work.

Below is what concerns me:

• The code doesn’t include Content-Type to the header if it’s set "boundary=calculated when request is sent"
• The suggested code to create “multipart/form-data” is

$headers = New-Object "System.Collections.Generic.Dictionary[[String],[String]]"
$headers.Add("authtoken", "bclzcBL3i2C0ccaWrb3EDLVSigwpWnrObDekm0+fxAM=")

$multipartContent = [System.Net.Http.MultipartFormDataContent]::new()
$stringHeader = [System.Net.Http.Headers.ContentDispositionHeaderValue]::new(“form-data”)
$stringHeader.Name = “solutionName”
$stringContent = [System.Net.Http.StringContent]::new(“SK”)
$stringContent.Headers.ContentDisposition = $stringHeader
$multipartContent.Add($stringContent)

$stringHeader = [System.Net.Http.Headers.ContentDispositionHeaderValue]::new("form-data")
$stringHeader.Name = "planName"
$stringContent = [System.Net.Http.StringContent]::new("Test plan")
$stringContent.Headers.ContentDisposition = $stringHeader
$multipartContent.Add($stringContent)

$body = $multipartContent

$response = Invoke-RestMethod 'http://server.com/services/v1/plan' -Method 'POST' -Headers $headers -Body $body
$response | ConvertTo-Json

but I don’t see correct body in Fiddler, just the below string

System.Net.Http.StringContent

Thanks

Postman for Windows
Version
11.8.1

Start at the PowerShell Invoke-RestMethod code generator and reproduce the multipart/form-data example from the issue. Compare the generated request with the Fiddler result, focusing on the missing Content-Type boundary and the body rendered as System.Net.Http.StringContent; done when the generated snippet sends the multipart fields correctly.