With block equivalent in C#?

Although C# doesn't have any direct equivalent for the general case, C# 3 gain object initializer syntax for constructor calls:

var foo = new Foo { Property1 = value1, Property2 = value2, etc };

See chapter 8 of C# in Depth for more details - you can download it for free from Manning's web site.

(Disclaimer - yes, it's in my interest to get the book into more people's hands. But hey, it's a free chapter which gives you more information on a related topic...)

This is what Visual C# program manager has to say: Why doesn't C# have a 'with' statement?

Many people, including the C# language designers, believe that 'with' often harms readability, and is more of a curse than a blessing. It is clearer to declare a local variable with a meaningful name, and use that variable to perform multiple operations on a single object, than it is to have a block with a sort of implicit context.