在PowerShell V1中，只有#使注释后面的文本成为注释。

# This is a comment in PowerShell

在PowerShell V2中<# #>可以用于块注释，更具体地说，可以用于帮助注释。

#REQUIRES -Version 2.0

<#
.SYNOPSIS
    A brief description of the function or script. This keyword can be used
    only once in each topic.
.DESCRIPTION
    A detailed description of the function or script. This keyword can be
    used only once in each topic.
.NOTES
    File Name      : xxxx.ps1
    Author         : J.P. Blanc (jean-paul_blanc@silogix-fr.com)
    Prerequisite   : PowerShell V2 over Vista and upper.
    Copyright 2011 - Jean Paul Blanc/Silogix
.LINK
    Script posted over:
    http://silogix.fr
.EXAMPLE
    Example 1
.EXAMPLE
    Example 2
#>
Function blabla
{}

有关. synopsis和.*的更多解释，请参阅about_Comment_Based_Help。

注意:这些函数注释由Get-Help CmdLet使用，可以放在关键字function之前，或者放在代码本身之前或之后的{}内部。

我参加这个聚会有点晚了，但似乎没有人实际上写了所有的用例。所以…

目前(2020年秋季及以后)仅支持的PowerShell版本是:

Windows PowerShell 5.1.x PowerShell 7.0.x。

您不希望或不应该使用不同版本的PowerShell。

两个版本(或任何其他版本，你可以在WPS 3.0-5.0, PS Core 6.x。X在一些过时的站)共享相同的评论功能。

一行注释

# Get all Windows Service processes <-- one line comment, it starts with '#'
Get-Process -Name *host*

Get-Process -Name *host* ## You could put as many ### as you want, it does not matter

Get-Process -Name *host* # | Stop-Service # Everything from the first # until end of the line is treated as comment

Stop-Service -DisplayName Windows*Update # -WhatIf # You can use it to comment out cmdlet switches

多行注释

<#
Everyting between '< #' and '# >' is
treated as a comment. A typical use case is for help, see below.

# You could also have a single line comment inside the multi line comment block.
# Or two... :)

#>

<#
.SYNOPSIS
    A brief description of the function or script.
    This keyword can be used only once in each topic.

.DESCRIPTION
    A detailed description of the function or script.
    This keyword can be used only once in each topic.

.NOTES
    Some additional notes. This keyword can be used only once in each topic.
    This keyword can be used only once in each topic.

.LINK
    A link used when Get-Help with a switch -OnLine is used.
    This keyword can be used only once in each topic.

.EXAMPLE
    Example 1
    You can use this keyword as many as you want.

.EXAMPLE
    Example 2
    You can use this keyword as many as you want.
#>

嵌套的多行注释

<#
Nope, these are not allowed in PowerShell.

<# This will break your first multiline comment block... #>
...and this will throw a syntax error.
#>

在代码中嵌套多行注释

<#
The multi line comment opening/close
can be also used to comment some nested code
or as an explanation for multi chained operations..
#>
Get-Service | <# Step explanation #>
Where-Object { $_.Status -eq [ServiceProcess.ServiceControllerStatus]::Stopped } |
<# Format-Table -Property DisplayName, Status -AutoSize |#>
Out-File -FilePath Services.txt -Encoding Unicode

边缘情况

# Some well written script
exit
Writing something after exit is possible but not recommended.
It isn't a comment.
Especially in Visual Studio Code, these words baffle PSScriptAnalyzer.
You could actively break your session in VS Code.

Here

# Single line comment in PowerShell

<#
--------------------------------------
Multi-line comment in PowerShell V2+
--------------------------------------
#>

你可以做:

 (Some basic code) # Use "#" after a line and use:

 <#
    for more lines
    ...
    ...
    ...
    ..
    .
 #>

在PowerShell V1中，只有#使注释后面的文本成为注释。

# This is a comment in PowerShell

在PowerShell V2中<# #>可以用于块注释，更具体地说，可以用于帮助注释。

#REQUIRES -Version 2.0

<#
.SYNOPSIS
    A brief description of the function or script. This keyword can be used
    only once in each topic.
.DESCRIPTION
    A detailed description of the function or script. This keyword can be
    used only once in each topic.
.NOTES
    File Name      : xxxx.ps1
    Author         : J.P. Blanc (jean-paul_blanc@silogix-fr.com)
    Prerequisite   : PowerShell V2 over Vista and upper.
    Copyright 2011 - Jean Paul Blanc/Silogix
.LINK
    Script posted over:
    http://silogix.fr
.EXAMPLE
    Example 1
.EXAMPLE
    Example 2
#>
Function blabla
{}

有关. synopsis和.*的更多解释，请参阅about_Comment_Based_Help。

注意:这些函数注释由Get-Help CmdLet使用，可以放在关键字function之前，或者放在代码本身之前或之后的{}内部。

是#。

关于特殊字符，请参见PowerShell -特殊字符和令牌。