Reading 2 files C# loops


I am trying to read 2 files both tab separated and the first string value before first tabs needed to be checked and if the keys are matching, i need to parse the last value in a line of the file.

I managed reading those files, by inner loop and when i find the key in the inner loop, i am returning a bool.

Is this the correct approach?

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Miguel OzSoftware EngineerCommented:
It seems correct but it depends on the file size.
For example if your file size > 200 MB it will consume memory if you keep the file contents until the program finishes execution. (Yep still some business shops use 4 GB RAM PCs)
Alexei KuznetsovMicrosoft Outlook MVPCommented:
I recommend you to perform basic indexing before working with your files. Some explanations:

1. Read the first file line by line and fill the Dictionary<string, int> dic1; where string is the key and int is the position in your file1. Or just <string, string> if the memory is not an issue (second string is the entire line).
2. Read the second file line by line and for each line line try to get the key from dic1. If found, you have lines from both files here. If not, there are no such key in file1.

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