Search for a string within the string[] of IEnumerable using Linq

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C#

ASP.NET

LINQ

I'm reading in records from a tab-delimited flat-file, and storing those in a

IEnumerable<string[]>

Please note that they're are a large amount of records.

I want to use Linq to traverse through the IEnumerable records quickly, but return the whole string[] array when I find a value within one of the values of the array.

Current Situation (works fine but a little slow):

private IEnumerable<string[]> customers = GetCustomersFromCache();

foreach (string[] customer in customers)
{
    var strFound = Array.FindAll(customer, str => str.ToLower().Contains(searchText.Text.ToLower()));

    foreach (string record in strFound)
    {
      //doing stuff here with string array
    }
}

So currently I'm looping through each Customers record, and then looping through each customer record. I can then grab any part of the customer array, and use its' data.

So can Linq be used to look at the string[] within the IEnumerable, determine if any part of the array contains the string I'm searching for, and finally return the whole array?

Which means basically making the following 1 Linq command:

foreach (string[] customer in customers)
{
    var strFound = Array.FindAll(customer, str => str.ToLower().Contains(searchText.Text.ToLower()));
}