<#
	.SYNOPSIS
		获取程序集文件属性的指定元数据特性
	
	.DESCRIPTION
		获取程序集文件属性的指定元数据特性
	
	.PARAMETER filePath
		程序集文件路径
	
	.PARAMETER name
		元数据名称
	
	.EXAMPLE
				PS C:\> Get-AssemblyMetadata -filePath 'C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.4\System.Text.Json.dll' -name 'RepositoryUrl'
				https://github.com/dotnet/runtime
	
	.NOTES
		Additional information about the function.
#>
function Get-AssemblyMetadata
{
	[OutputType([string])]
	param
	(
		[Parameter(Mandatory = $true, HelpMessage = '程序集文件路径')]
		[Alias('p')]
		[string]$filePath,
		[Parameter(Mandatory = $true, HelpMessage = '元数据名称')]
		[Alias('n')]
		[string]$name
	)
	
	if (-not (Test-Path $filePath))
	{
		return ""
	}
	
	## $asm = [System.Reflection.Assembly]::LoadFile($filePath)
	## $data = $asm.CustomAttributes

	$buffer = [System.IO.File]::ReadAllBytes($filePath)
	$asm = [System.Reflection.Assembly]::Load($buffer)
	$data = [System.Reflection.CustomAttributeData]::GetCustomAttributes($asm)
	foreach ($attr in $data)
	{
		if ($attr.AttributeType.Name -eq 'AssemblyMetadataAttribute' -and $attr.ConstructorArguments.Count -eq 2)
		{
			$nameArg = $attr.ConstructorArguments[0];
			$valueArg = $attr.ConstructorArguments[1];
			if ($nameArg.Value -eq $name)
			{
				return $valueArg.Value
			}
		}
	}
	
	return ""
}

使用示例

PS C:\> Get-AssemblyMetadata -filePath 'C:\Program Files\dotnet\shared\Microsoft.NETCore.App\6.0.4\System.Text.Json.dll' -name 'RepositoryUrl'
https://github.com/dotnet/runtime