gistfile1.ps1

$parameters = @{
     ConnectionDetails = @{
         ServerUrl = "teamcity.codebetter.com"
         Credential = New-Object System.Management.Automation.PSCredential("teamcitysharpuser", (ConvertTo-SecureString "qwerty" -asplaintext -force))
     }
     BuildConfigId = "bt437"
}

$builds = Get-BuildConfigsByBuildConfigId @parameters

foreach($build in $builds)
{
    Write-Host $build.Number
}