Umbraco Cheat Sheet for V4.7.1+ Dynamic-Nodes & v6+ MVC Razor Cheatsheets

Below are the links to download cheat sheets for umbraco which I have found really useful. 

• Razor DynamicNode Cheat Sheet
• Umbraco v6 MVC Razor Cheat Sheet

C# Razor Syntax Quick Reference

Syntax/Sample	Razor	Web Forms Equivalent (or remarks)
Code Block	@{   int x = 123;   string y = "because."; }	<%   int x = 123;   string y = "because."; %>
Expression (Html Encoded)	<span>@model.Message</span>	<span><%: model.Message %></span>
Expression (Unencoded)	<span> @Html.Raw(model.Message) </span>	<span><%= model.Message %></span>
Combining Text and markup	@foreach(var item in items) {   <span>@item.Prop</span> }	<% foreach(var item in items) { %>   <span><%: item.Prop %></span> <% } %>
Mixing code and Plain text	@if (foo) {   <text>Plain Text</text> }	<% if (foo) { %>   Plain Text <% } %>
Mixing code and plain text (alternate)	@if (foo) {   @:Plain Text is @bar }	Same as above
Email Addresses	Hi philha@example.com	Razor recognizes basic email format and is smart enough not to treat the @ as a code delimiter
Explicit Expression	<span>ISBN@(isbnNumber)</span>	In this case, we need to be explicit about the expression by using parentheses.
Escaping the @ sign	<span>In Razor, you use the @@foo to display the value of foo</span>	@@ renders a single @ in the response.
Server side Comment	@* This is a server side multiline comment *@	<%-- This is a server side multiline comment --%>
Calling generic method	@(MyClass.MyMethod())	Use parentheses to be explicit about what the expression is.
Creating a Razor Delegate	@{   Funcobject> b =    @<strong>@item</strong>; } @b("Bold this")	Generates a Func that you can call from within Razor. See this blog post for more details.
Mixing expressions and text	Hello @title. @name.	Hello <%: title %>. <%: name %>.
NEW IN RAZOR v2.0/ASP.NET MVC 4
Conditional attributes	<div class="@className"></div>	When className = null <div></div> When className = "" <div class=""></div> When className = "my-class" <div class="my-class"></div>
Conditional attributes with other literal values	<div class="@className foo bar"> </div>	When className = null <div class="foo bar"></div> Notice the leading space in front of foo is removed. When className = "my-class" <div class="my-class foo bar"> </div>
Conditional data-* attributes. data-* attributes are always rendered.	<div data-x="@xpos"></div>	When xpos = null or "" <div data-x=""></div> When xpos = "42" <div data-x="42"></div>
Boolean attributes	<input type="checkbox"   checked="@isChecked" />	When isChecked = true <input type="checkbox"   checked="checked" /> When isChecked = false <input type="checkbox" />
URL Resolution with tilde	<script src="~/myscript.js"> </script>	When the app is at / <script src="/myscript.js"> </script> When running in a virtual application named MyApp <script src="/MyApp/myscript.js"> </script>

Notice in the “mixing expressions and text” example that Razor is smart enough to know that the ending period is a literal text punctuation and not meant to indicate that it’s trying to call a method or property of the expression.

Reference:http://haacked.com/archive/2011/01/06/razor-syntax-quick-reference.aspx