c# - how can I convert this foreach loop to linq? -

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i'm new linq. want convert these lines of code linq lambda expression, if makes sense how can achieve?

foreach (var type in essay.text) {      string text =           $"{"here result"}\n{method(type)}";      if (text.length <= 20 && !string.isnullorempty(method(type)))      {           essay.total += text;      } }

with of resharper:

essay.total = string.concat(             essay.text.select(type => new {type, text = $"{"here result"}\n{method(type)}"})                 .where(@t => @t.text.length <= 20 && !string.isnullorempty(method(@t.type)))                 .select(@t => @t.text)             );

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