What is the equivalent syntax in C#, if any? [duplicate]

This question already has answers here: With block equivalent in C#? (19 answers) 开发者_StackOverflow社区Closed 9 years ago.

Does C# have any equivalent for VB6

With 
End With

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There's nothing quite equivalent, but C# 3 gained the ability to set properties on construction:

var person = new Person { Name = "Jon", Age = 34 };

And collections:

var people = new List<Person>
{
    new Person { Name = "Jon" },
    new Person { Name = "Holly"}
};

It's definitely not a replacement for all uses of With, but worth knowing for some of them.

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C# does not have any equivalent syntax. The closest are object initializers, but they are not the same:

var obj = new SomeThing {
    Height = 100,
    Text = "Hello, World",
    ForeColor = System.Drawing.Color.Green
}

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No.

What comes close are object and list initializers.

Person p = new Person()
{
    FirstName = "John",
    LastName = "Doe",
    Address = new Address()
    {
        Street = "1234 St.",
        City = "Seattle"
    }
};

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It is by no means an equivalent, however, if it is the typing you're trying to reduce, you can do.

{
  var o = myReallyReallyReallyReallyLongObjectName;
  o.Property1 = 1;
  o.Property2 = 2;
  o.Property3 = 3;
}

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There is no C# equivalent to Visual Basic's With keyword.

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There is no equivalent in c# -> read more here in the comments http://blogs.msdn.com/b/csharpfaq/archive/2004/03/11/why-doesn-t-c-have-vb-net-s-with-operator.aspx

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One near-equivalent would be calling a method that is a member of a class. You don't have to repeatedly name the owning object inside class members - it's implicit in the fact that the function is a member, called for a given instance.

I doubt a direct equivalent of With/End With is a good idea in C# for this reason. If you found yourself typing an object's name over and over in a given scope, it's a good indication that the code in question would make a good method on that object's class.

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There is no direct equivalent. You can set properties on construction, as others explained, or you can assign your expression to a variable with a short name. The following should be semantically equivalent:

With <expression>
    .something ...
    .somethingElse ...
End With

var w = <expression>;
w.something ...
w.somethingElse ...