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Help with C# generics error - “The type 'T' must be a non-nullable value type”
I'm new to C# and don't understand why the following code doesn't work.
4 Answers
4
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How to get only time from date-time C# [closed]
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There is only DateTime type in C# and it consist of both the date and time portion. If you don't care about the Date portion of DateTime, set it to default value like this:
DateTime myTime = default(DateTime).Add(myDateTime.TimeOfDay)
This way you can b...
Return multiple values to a method caller
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In C# 7 and above, see this answer.
In previous versions, you can use .NET 4.0+'s Tuple:
For Example:
public Tuple<int, int> GetMultipleValue()
{
return Tuple.Create(1,2);
}
Tuples with two values have Item1 and ...
How to execute a stored procedure within C# program
I want to execute this stored procedure from a C# program.
13 Answers
13
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How is Generic Covariance & Contra-variance Implemented in C# 4.0?
I didn't attend PDC 2008, but I heard some news that C# 4.0 is announced to support Generic covariance and contra-variance. That is, List<string> can be assigned to List<object> . How could that be?
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Why does Boolean.ToString output “True” and not “true”
... XML as XML's boolean type is lower case , and also isn't compatible with C#'s true/false (not sure about CLS though).
8 A...
Reflecting parameter name: abuse of C# lambda expressions or syntax brilliance?
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This has poor interop. For example, consider this C# - F# example
C#:
public class Class1
{
public static void Foo(Func<object, string> f)
{
Console.WriteLine(f.Method.GetParameters()[0].Name);
}
}
F#:
Class1.Foo(fun yadda -> "hello")
Resu...
Why does the C# compiler not fault code where a static method calls an instance method?
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UPDATE: Below answer was written in 2012, before the introduction of C# 7.3 (May 2018). In What's new in C# 7.3, the section Improved overload candidates, item 1, it is explained how the overload resolution rules have changed so that non-static overloads are discarded early. So the below answe...
How can I initialize a C# List in the same line I declare it. (IEnumerable string Collection Example
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I like this no-parentheses method, what c# version did that start with?
– SilverbackNet
Dec 14 '10 at 10:36
9
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In c# what does 'where T : class' mean?
In C# what does where T : class mean?
10 Answers
10
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