using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks;  namespace FloatConversion {      class MainApp     {         static void Main(string[] args)         {             float a = 69.6875f;             Console.WriteLine("a : {0}", a);              double b = (double)a;             Console.WriteLine("b : {0}", b);              Console.WriteLine("69.6875 == b : {0}", 69.6875 == b);              float x = 0.1f;             Console.WriteLine("x : {0}", x);              double y = (double)x;             Console.WriteLine("y : {0}", y);              Console.WriteLine("0.1 == y : {0}", 0.1 == y);                Console.ReadLine();         }     } }   I just started learning C#. As a Newbie, I was wondering that what a : {0} means in Console.WriteLine() method.  similarly, what does 69.6875 == b : {0} mean? how can it be displayed as a boolean?  Thank u in advance.
In a dictionary like this:  Dictionary&lt;string, string&gt; openWith = new Dictionary&lt;string, string&gt;();  openWith.Add("txt", "notepad.exe"); openWith.Add("bmp", "paint.exe"); openWith.Add("dib", "paint.exe"); openWith.Add("rtf", "wordpad.exe");  Console.WriteLine("For key = \"rtf\", value = {0}.", openWith["rtf"]);   The output is:     For Key = "rtf" value = wordpad.exe   What does the {0} mean?
Apart from testing it myself, I've seen a few posts  and , including from Sketchup users like me, sort of circle around this topic but never ask this question directly. How can I overcome these problems in DupliGroups or Collection Instances?  moving its origin seems to require moving to World origin (and using up a layer for clarity) &lt;=&gt; linked meshes have their own local origin which I can move data around in Edit Mode (easy enough)  It is impractical to link up DupliGroup data to previously created meshes because the origin mismatch as above, and the mesh data that remains in it and needs to be deleted somehow  Linked meshes don't have the above two problems (can be 'blocked in' and then detailed up all at once) but I can't add objects to them, only faces. Say I'd like to add handles as linked meshes, because handles are used elsewhere in the model too.    How feasible would it be to make a linked object type with deeper hierarchy? Say an object that would look at its children and simply make every other instance have the same children. It would also mean dragging and dropping in outliner would be the simplest way to manage it by the looks of it. SQL Azure and Full-Text Catalogs, Indexes and Searching Building a version of ubuntu without any USB functionality What's the difference between a projection and a datum? Shell scripting: Way to parse parameters from command line myscript [-a a-arg] [-c c-arg] [-b] [-e] somedirectory   Given that I want my shell script be invoked at the command line using the above parameters - where [these brackets] denote that they are optional - what is the best method to parse them? 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