#c-4.0

Answer: To Workflow or Not to Workflow? #solution #programming #answer

To Workflow or Not to Workflow?

I am responsible for a team of developers who will are about to start development of a light weight insurance claims system. The system involves a lot of manual tasks and business workflows and we are looking at using Windows Workflow (.NET 4.0).

An example of the business domain is as follows: A policy holder calls the contact centre to lodge a claim. This…

Resolved: Why does this (null || !TryParse) conditional result in "use of unassigned local variable"? #answer #fix #solution

Why does this (null || !TryParse) conditional result in "use of unassigned local variable"?

The following code results in use of unassigned local variable “numberOfGroups”:

int numberOfGroups; if(options.NumberOfGroups == null || !int.TryParse(options.NumberOfGroups, out numberOfGroups)) { numberOfGroups = 10; }

However, this code works fine (though, ReSharper says the = 10 is redundant):

int…

How to: C# 4.0 optional out/ref arguments #development #fix #answer

C# 4.0 optional out/ref arguments

Does C# 4.0 allow optional out or ref arguments?

Answer [by Tomas Petricek]: C# 4.0 optional out/ref arguments

As already mentioned, this is simply not allowed and I think it makes a very good sense. However, to add some more details, here is a quote from the C# 4.0 Specification, section 21.1:

Formal parameters of constructors, methods, indexers and delegate…

Fixed Why are C# 4 optional parameters defined on interface not enforced on implementing class? #dev #it #asnwer

Why are C# 4 optional parameters defined on interface not enforced on implementing class?

I noticed that with the optional parameters in C# 4 if you specify a parameter as optional on an interface you DON’T have to make that parameter optional on any implementing class:

public interface MyInterface { void TestMethod(bool flag=false); } public class MyClass : MyInterface { public void…

How to: What is Microsoft.csharp.dll in .NET 4.0

What is Microsoft.csharp.dll in .NET 4.0

This DLL is added by default in Visual Studio 2010 projects. What is this new assembly used for? It does not seem to contain much after looking at it using Reflector and Google does not seem to have much to say about it either.

Answer: What is Microsoft.csharp.dll in .NET 4.0

Always removed it so far. No issues yet.

Answer: What is Microsoft.csharp.dll in…

How to: What is the difference between task and thread?

What is the difference between task and thread?

In C# 4.0, we have Task in the System.Threading.Tasks namespace. What is the true difference between Thread and Task. I did some sample program(help taken from MSDN) for my own sake of learning with

Parallel.Invoke Parallel.For Parallel.ForEach

but have many doubts as the idea is not so clear.

I have initially searched in Stackoverflow for a…

Fixed What are the true benefits of ExpandoObject? #dev #it #asnwer

What are the true benefits of ExpandoObject?

The ExpandoObject class being added to .NET 4 allows you to arbitrarily set properties onto an object at runtime.

Are there any advantages to this over using a Dictionary<string,object>, or really even a Hashtable? As far as I can tell, this is nothing but a hash table that you can access with slightly more succinct syntax.

For example, why is this:

d…

Fixed Interop type cannot be embedded #dev #it #asnwer

Interop type cannot be embedded

I am creating an web application on the .net 4.0 framework (beta2 ) in C#.

When I try to use a assembly called “ActiveHomeScriptLib”, I get the following error:

Interop type ‘ActiveHomeScriptLib.ActiveHomeClass’ cannot be embedded. Use the applicable interface instead.

When I change the framework to version 3.5, I don’t have any errors.

What is an Interop Type…