代码[关闭]的lambda表达式等价物是什么

我有这段代码,不知道它的lambda表达式是什么。我试过了,事实上,我读过了同样的高级教程,仍然无法从注释行开始理解以下代码的lambda表达式。

IDictionary<string, GitItem> mappedPathToGitItems = new Dictionary<string, GitItem>();

mappedPathToGitItems = clientWrapper.GetFilePathToGitItems(
        gitLatestCommit, versionDescriptor, mappedPath, maxBatchSize);

List<string> filepaths = new List<string>();

// Lambda expression starts from here
// filepaths = {Lambda expression of the below code.}
foreach(KeyValuePair<string, GitItem> entry in mappedPathToGitItems)
{
    string item = entry.Key;
    GitItem gitItem = entry.Value;

    if(gitItem != null)
    {
        filepaths.Add(item);
    }
}
// Ends here