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Efficient list of unique strings C#

What is the most efficient way to store a list of strings ignoring any duplicates? I was thinking a dictionary may be best inserting strings by writing dict[str] = false; and enumerating through the keys as a list. Is that a good solution? ...
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android image button

How can i create a button with no text and an image centered horizontally ? I don't want to use an ImageButton because I want to define a different backgound image ...
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Regex to replace everything except numbers and a decimal point

I have a text field that needs to remain only text or decimal. Here is the code that I'm currently using to replace everything except numbers and a decimal point. Issue is, I can't figure out a regex that will identify everything else ...
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How to get the home directory in Python?

I need to get the location of the home directory of the current logged-on user. Currently, I've been using the following on Linux: ...
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Declare variable in table valued function

How can I declare a variable in a table valued function? (like in my title) 1 Answer 1...
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Multiple commands on a single line in a Windows batch file

In Unix, we can put multiple commands in a single line like this: 1 Answer 1 ...
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Write string to text file and ensure it always overwrites the existing content.

I have a string with a C# program that I want to write to a file and always overwrite the existing content. If the file isn't there, the program should create a new file instead of throwing an exception. ...
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@OneToMany List vs Set difference

Is there any difference if I use 2 Answers 2 ...
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NSLog an object's memory address in overridden description method

I am overriding an object's description method. I need to know how to print the object's memory address to replace {???} in the code below: ...
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How to check which locks are held on a table

How can we check which database locks are applied on which rows against a query batch? 6 Answers ...