Data Type - string

System.String

Returning the Length of a Constant

String.Copy("some text").Length

Hexadecimal Strings

String Literals

A string literal constant is a hard coded string value.
There are two types of string literals in C#.
You have the regular string literal which is enclosed in speech marks.
You also have the verbatim literal which is prefixed with an ampersand character.

Regular String Literals

string myString; 
myString = "C:/temp" 
System.Diagnostics.Trace.Write(myString);      '= "C:/temp"  

myString = "C://temp" 
System.Diagnostics.Trace.Write(myString);      '= "C://temp"

Some characters cannot be included directly into a string, for example a double quotation mark.
Instead of using just these characters you will have to prefix them with an escape sequence.

myString = "C:\\temp" 
System.Diagnostics.Trace.Write(myString);      '= "C:\temp"  

myString = "C:\"temp" 
System.Diagnostics.Trace.Write(myString);      '= "C:"temp"

Handles fixed length strings and do not need editing
The Chars property holds an array of all the characters in a string starting at index 0.

Hard code a string literal

If you want to hard code a string literal to get the length

"Details (" & sMyId & ")" 
= Substring(LEN("Details"))

Properties

Chars	Gets the character at a specified character position in this instance. In C# this property is the indexer for the string class.
Length	Returns the length of the string.

Methods

Clone	Returns a reference to this instance of String.
Compare	Compares two strings.
CompareOrdinal	Compares two String objects, without considering the local national language or culture.
CompareTo	Compares this instance with a specified object.
Concat	Concatenates one or more instances of String, or the String representations of the values of one or more instances of Object.
Copy	Creates a new string by copying an existing string.
CopyTo	Copies a specified number of characters from a specified position in this instance to a specified position in an array of Unicode characters.
EndsWith	Determines whether the end of this instance matches the specified String
Equals	Determines if two strings are equal (i.e. have the same value).
Format	Formats a string to a particular specification
GetEnumerator	Retrieves an object that can iterate through the individual characters in this instance.
GetHashCode	Returns the hash code for this instance.
GetType	Gets the Type of the current instance.
GetTypeCode	Returns the TypeCode for class String.
IndexOf	Returns the index of the first occurrence of a character in a String. This is the equivalent for the VBA InStr() function
IndexOfAny	Returns the index of the first occurrence in any of the characters in an array.
Insert	Inserts a specified instance of String at a specified index position in this instance.
Intern	Retrieves the system's reference to the specified String.
IsInterned
Join	Concatenates a specified separator String between each element of a specified String array, yielding a single concatenated string.
LastIndexOf	Returns the index of the last occurrence of a character in a String.
LastIndexOfAny	Returns the index of the last occurrence in any of the characters in an array.
PadLeft	Right aligns the characters in the string by padding the left with spaces.
PadRight	Left aligns the characters in the string by padding the right with spaces.
Remove	Deletes the specified number of characters.
Replace	Replaces all occurrences of a single character with another character or String.
Split	Returns an array. Divides a string, returning the substrings delimited by a specified character.
StartsWith	Indicates if a string starts with the specified characters.
Substring	Retrieves a substring from the string.
ToCharArray	Copies the characters from the string to a character array.
ToLower	Returns the text string with all characters converted to lowercase (String).
ToString	Converts the value of this instance to a String.
ToUpper	Returns the text string with all the characters converted to uppercase (String).
Trim	Returns the text string removing leading and trailing spaces (String).
TrimEnd	Returns the text string removing only trailing spaces (String).
TrimStart	Returns the text string removing only leading spaces (String).

String.Empty

Use this instead of double quotes "".

String.IsNullOrEmpty

Instead of

if ((variable != null) && (variable != String.Empty)) 
{ 
}

use

if (String.IsNullOrEmpty(variable) 
{ 
}

String.IsNullOrWhiteSpace

Added in .NET 4.0

Instead of

if (String.IsNullOrEmpty(variable.Trim())) 
{ 
}

use

if (String.IsNullOrWhiteSpace(variable)) 
{ 
}