大约有 6,100 项符合查询结果（耗时：0.0218秒） [XML]
Fluent and Query Expression — Is there any benefit(s) of one over other?
...ame
VB.NET's query syntax is also more powerful and less verbose than in C#: https://stackoverflow.com/a/6515130/284240
For example this LINQ to DataSet(Objects) query
VB.NET:
Dim first10Rows = From r In dataTable1 Take 10
C#:
var first10Rows = (from r in dataTable1.AsEnumerable()
...
How To: Best way to draw table in console app (C#)
I have an interesting question.
Imagine I have a lot of data changing in very fast intervals.
I want to display that data as a table in console app. f.ex:
...
What is the difference between a reference type and value type in c#?
...etail. What is the difference between a reference type and a value type in C#?
14 Answers
...
A reference to the dll could not be added
When I add a .dll file as a reference in C# application it shows an error :
17 Answers
...
When do you use the “this” keyword? [closed]
...
There are several usages of this keyword in C#.
To qualify members hidden by similar name
To have an object pass itself as a parameter to other methods
To have an object return itself from a method
To declare indexers
To declare extension methods
To pass parameters b...
What is the definition of “interface” in object oriented programming
...guarantee, that a certain class can do something.
Consider this piece of C# code here:
using System;
public interface IGenerate
{
int Generate();
}
// Dependencies
public class KnownNumber : IGenerate
{
public int Generate()
{
return 5;
}
}
public class SecretNumber...
The type 'string' must be a non-nullable type in order to use it as parameter T in the generic type
...gs like Nullable<string> so it is disallowed.
Also if you are using C# 3.0 or later you can simplify your code by using auto-implemented properties:
public class WordAndMeaning
{
public string Word { get; set; }
public string Meaning { get; set; }
}
...
What exactly is an “open generic type” in .NET? [duplicate]
...
The C# language defines an open type to be a type that's either a type argument or a generic type defined with unknown type arguments:
All types can be classified as either open types or closed types. An open type is a type that...
Literal suffix for byte in .NET?
...ntion of a literal suffix on the MSDN reference for Byte as well as in the C# 4.0 Language Specification. The only literal suffixes in C# are for integer and real numbers as follows:
u = uint
l = long
ul = ulong
f = float
m = decimal
d = double
If you want to use var, you can always cast the byte...
What is the difference between String.Empty and “” (empty string)?
...nt. Places where they behave differently are:
Default Parameter value in C# 4.0 or higher
void SomeMethod(int ID, string value = string.Empty)
// Error: Default parameter value for 'value' must be a compile-time constant
{
//... implementation
}
Case expression in switch statement
string s...