I wanted to start a series of how to use AWS Cloud Development Kit (CDK) to create infrastructure on Amazon. In our first example we will tackle the fundamental of a Virtual Private Cloud (VPC). We will be using AWS CDK to create a VPC in C#. You may wonder what about CloudFormation json or […]
Category: .NET
If you are using AWS S3 C# TransferUtilityUploadRequest and when you try to upload objects onto S3 you can potentially get Access Denied. The reason could your IAM Role is not defined to have access or your bucket name is incorrect. What do you mean bucket name is incorrect? Basically it boils down to that […]
If you are working on AWS Lambda Dotnet with C# and find out that you are getting something like an error like below. The main reason is that you most likely created the lambda on the console first and then tried to upload the code using dotnet cli e.g dotnet lambda deploy-function “functionName”. In order […]
In C#7 there is an enhancement in the main method Async Main in C# that will allow you to await in your main method. Let me show you an example of how it was in C#6 and then how it has changed in C#7. You will remember this most likely
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static int Main() { return SomeAsyncCall().GetAwaiter().GetResult(); } |
One will need to […]
In C#7 there is an improvement on using out parameter. Some of you may remember writing code like below.
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string hourString = "5"; int hour; if (int.TryParse(hourString, out hour)) { Console.WriteLine($"The hour is {hour}"); } |
The improvement that C#7 brings is you can now declare out variables in the argument list of a method call, rather than writing a separate declaration statement like below:
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string hourString = "5"; if (int.TryParse(hourString, out int hour)) { Console.WriteLine($"The hour is {hour}"); } |
And it doesn’t end there […]
In C# 7 there the new feature called Local functions in C#. Basically Local functions allow one to write a function within the body of another method or function. It comes in handly in the case lets say you are creating a helper function that are mostly just used in one class or where the […]
In C# 7 there are Expression Bodied Accessors which allows you to write getter and setters somewhat more functional way, somewhat lambda’ish. Let me show you an example. You may remember the old way of writing getter and setters like below. Pre Expression Bodied Accessors Getter and Setter
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public class Automobile { private string _brand; public string Brand { get { return _brand; } set { _brand = value; } } } |
Expression Bodied Accessors in C# 7 […]
In C#7 there are Digit Separators and Binary Literals which were added. One may wonder what these are? Basically you can replace long number values with underscore (_) such that code readability is improved. Let me give you couple of examples of it to make it clear.
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//old way of var myBigNumber = 12345678901234567890; //new way with digital separators var myBigNumberNewWay = 123_456_789_012_345_678_90; |
Neat but it doesn’t end there you […]
So one may ask “What is the advantage of using discards in C#?”, and if you don’t know what discards are you can check out the MS C#7 Documentation about it. Basically discards are variables in simple terms, and the declaration of the variable as a discard is by assigning it the underscore (_) as […]
Some may wonder what is the difference between ValueTuple and Tuple that was released in C# 7, and you might say I have been using Tuples for a while now. Whats the difference? Some of you will remember with code like below that showcase the use of ValueTuple since .NET Framework 4.7
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public Tuple<string, string> GetUserName(int userid) { var firstname = db.GetFirstname(userid); var lastname = db.GetLastname(userid); return new Tuple(firstname, lastname); } |
In order […]
