Introduction

The Format methods are a set of overloads in the [System.String](<https://msdn.microsoft.com/en-us/library/system.string(v=vs.110).aspx>) class used to create strings that combine objects into specific string representations. This information can be applied to [String.Format](<https://msdn.microsoft.com/en-us/library/system.string.format(v=vs.110).aspx>), various WriteLine methods as well as other methods in the .NET framework.

Syntax

• string.Format(string format, params object[] args)
• string.Format(IFormatProvider provider, string format, params object[] args)
• $“string {text} blablabla” // Since C#6

Parameters

• format : A composite format string, which defines the way args should be combined into a string.
• args : A sequence of objects to be combined into a string. Since this uses a [params](<https://msdn.microsoft.com/en-us/library/system.string(v=vs.110).aspx>) argument, you can either use a comma-separated list of arguments or an actual object array.
• provider : A collection of ways of formatting objects to strings. Typical values include CultureInfo.InvariantCulture and CultureInfo.CurrentCulture

Notes:

• String.Format() handles null arguments without throwing an exception.
• There are overloads that replace the args parameter with one, two, or three object parameters.