EditorConfig file added and documented

content/contributing/cs-coding-style.md

@@ -6,7 +6,7 @@ The general rule we follow is "use Visual Studio defaults". For details check th
 
 1. We use [Allman style](https://en.wikipedia.org/wiki/Indent_style#Allman_style) braces, where each brace begins on a new line. Even a single line statement block should go with braces and nested in other statement blocks that use braces.
 2. We use four spaces of indentation (no tabs).
-3. We use `_camelCase` for internal and private fields and use `readonly` where possible. Prefix static fields can be used with `s_` and thread static fields with `t_`. When used on static fields, `readonly` should come after `static` (i.e. `static readonly` not `readonly static`).
+3. We use `_camelCase` for internal and private fields and use `readonly` where possible. Prefix static fields with `s_` and thread static fields with `t_`. When used on static fields, `readonly` should come after `static` (i.e. `static readonly` not `readonly static`).
 4. We avoid `this.` unless absolutely necessary.
 5. We always specify the visibility, even if it's the default (i.e.
    `private string _foo` not `string _foo`). Visibility should be the first modifier (i.e.