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A class’s constructor header must specify a return type of void.

When you call a string object’s Split method, the method extracts tokens from the string and returns them as integers.

In an interpolated string, the minimum field width is the minimum number of spaces that should be used to display a value, and if the value is too large to fit in the specified field width, the number will be truncated.

In an interpolated string, if you want a number to be left-justified within its field, you insert a minus sign (-) before the field width specifier.

The char data type provides a single method that determines whether a character is a letter or a number.

You can use a subscript expression such as name[3] = ‘A’ to change the value of a character within a string.

When reading the contents of a file into an array, your loop must always iterate until the array is full.

Assume amount is a decimal variable that has been assigned a value. The following interpolated string formats the value of the amount variable as currency:$”The amount is {amount:Curr}”;

The default value of a string array’s elements is null.

In the following statement, the car variable is argument 1: string message = String.Format(“I own a blue {0}.”, car);