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How can I check a C# variable is an empty string “” or null? [duplicate]

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What is the C# Using block and why should I use it? [duplicate]

What is the purpose of the Using block in C#? How is it different from a local variable? 9 Answers ...
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How to determine if a type implements an interface with C# reflection

Does reflection in C# offer a way to determine if some given System.Type type models some interface? 15 Answers ...
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Quick way to create a list of values in C#?

I'm looking for a quick way to create a list of values in C#. In Java I frequently use the snippet below: 10 Answers ...
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Getting all file names from a folder using C# [duplicate]

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Upload file to FTP using C#

I try upload a file to an FTP-server with C#. The file is uploaded but with zero bytes. 9 Answers ...
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Convert integer to binary in C#

... Convert from any classic base to any base in C# String number = "100"; int fromBase = 16; int toBase = 10; String result = Convert.ToString(Convert.ToInt32(number, fromBase), toBase); // result == "256" Supported bases are 2, 8, 10 and 16 ...
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How can you strip non-ASCII characters from a string? (in C#)

How can you strip non-ASCII characters from a string? (in C#) 11 Answers 11 ...
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Nested using statements in C#

...en after the unmanaged resourced have been freed. According to Microsoft's C# reference, "You can instantiate the resource object and then pass the variable to the using statement, but this is not a best practice. In this case, the object remains in scope after control leaves the using block even th...
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Why should you remove unnecessary C# using directives?

...ewer namespaces to look-up types to resolve. (this is especially true for C# 3.0 because of extension methods, where the compiler must search all namespaces for extension methods for possible better matches, generic type inference and lambda expressions involving generic types) can potentially help...