{"id":2598,"date":"2023-07-08T09:05:35","date_gmt":"2023-07-08T02:05:35","guid":{"rendered":"https:\/\/csharptutorial.net\/?page_id=2598"},"modified":"2023-07-08T09:08:05","modified_gmt":"2023-07-08T02:08:05","slug":"csharp-string-concat","status":"publish","type":"page","link":"https:\/\/www.csharptutorial.net\/csharp-string-methods\/csharp-string-concat\/","title":{"rendered":"C# String Concat"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you will learn how to use the C# String Concat()<\/code> method to concatenate two or more strings into a string.<\/p>\n\n\n\n

If you want to concatenate multiple strings with a separator, you can use the Join()<\/a><\/code> method instead.<\/p>\n\n\n\n

C# string Concat()<\/code> method allows you to concatenate multiple strings into one string. The Concat()<\/code> method has many overloads that provide flexibility for concatenation.<\/p>\n\n\n\n

Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>)<\/h2>\n\n\n\n

This overload concatenates the string representations of four specified read-only character spans into a string. For example:<\/p>\n\n\n

ReadOnlySpan<char<\/span>> span1 = \"Hello\"<\/span>.AsSpan();\nReadOnlySpan<char<\/span>> span2 = \" \"<\/span>.AsSpan();\nReadOnlySpan<char<\/span>> span3 = \"World\"<\/span>.AsSpan();\nReadOnlySpan<char<\/span>> span4 = \"!\"<\/span>.AsSpan();\n\nvar<\/span> result = string<\/span>.Concat(span1, span2, span3, span4);\nConsole.WriteLine(result);<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
Hello World!<\/code><\/span><\/pre>\n\n\n
Concat(String, String, String, String)<\/h2>\n\n\n\n
This overload concatenates four specified strings into a string. For example:<\/p>\n\n\n
string<\/span> str1 = \"Hello\"<\/span>;\nstring<\/span> str2 = \" \"<\/span>;\nstring<\/span> str3 = \"World\"<\/span>;\nstring<\/span> str4 = \"!\"<\/span>;\n\nvar<\/span> result = string<\/span>.Concat(str1, str2, str3, str4);\nConsole.WriteLine(result);<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
Hello World!<\/code><\/span><\/pre>\n\n\n
Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>, ReadOnlySpan<Char>)<\/h2>\n\n\n\n
This overload concatenates the string representations of three specified read-only character spans into a string. For example:<\/p>\n\n\n
ReadOnlySpan<char<\/span>> span1 = \"Hello\"<\/span>.AsSpan();\nReadOnlySpan<char<\/span>> span2 = \" \"<\/span>.AsSpan();\nReadOnlySpan<char<\/span>> span3 = \"World\"<\/span>.AsSpan();\n\nvar<\/span> result = string<\/span>.Concat(span1, span2, span3);\nConsole.WriteLine(result);\n<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
Hello World<\/code><\/span><\/pre>\n\n\n
Concat(Object, Object, Object)<\/h2>\n\n\n\n
This overload concatenates the string representations of three specified objects into a string. For example:<\/p>\n\n\n
object<\/span> obj1 = 42<\/span>;\nobject<\/span> obj2 = \" is the answer to \"<\/span>;\nobject<\/span> obj3 = \"everything\"<\/span>;\n\nvar<\/span> result = string<\/span>.Concat(obj1, obj2, obj3);\nConsole.WriteLine(result);<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
42 is the answer to everything<\/code><\/span><\/pre>\n\n\n
Concat(String, String)<\/h2>\n\n\n\n
This overload concatenates two strings into a string. For example: <\/p>\n\n\n
string<\/span> str1 = \"Hello\"<\/span>;\nstring<\/span> str2 = \"World\"<\/span>;\n\nvar<\/span> result = string<\/span>.Concat(str1, str2);\nConsole.WriteLine(result);<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
HelloWorld<\/code><\/span><\/pre>\n\n\n
Concat(String, String, String)<\/h2>\n\n\n\n
This overload concatenates three strings into a string. For example:<\/p>\n\n\n
object<\/span> obj1 = \"Hello\"<\/span>;\nobject<\/span> obj2 = \"World\"<\/span>;\n\nvar<\/span> result = string<\/span>.Concat(obj1, obj2);\nConsole.WriteLine(result);<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
HelloWorld<\/code><\/span><\/pre>\n\n\n
Concat(Object, Object)<\/h2>\n\n\n\n
This overload concatenates the string representations of two specified objects into a string. For example:<\/p>\n\n\n
object<\/span> obj1 = \"Hello\"<\/span>;\nobject<\/span> obj2 = \"World\"<\/span>;\n\nvar<\/span> result = string<\/span>.Concat(obj1, obj2);\nConsole.WriteLine(result);<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
HelloWorld<\/code><\/span><\/pre>\n\n\n
Concat(String[])<\/h2>\n\n\n\n
This overload concatenates the elements of a specified string array<\/a> into a string:<\/strong><\/p>\n\n\n
string<\/span>[] strings = { \"Hello\"<\/span>, \" \"<\/span>, \"World\"<\/span>, \"!\"<\/span> };\n\nvar<\/span> result = string<\/span>.Concat(strings);\nConsole.WriteLine(result);<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
Hello World!<\/code><\/span><\/pre>\n\n\n
Concat(Object[])<\/h2>\n\n\n\n
This overload concatenates the string representations of the elements in a specified object array. For example:<\/p>\n\n\n
object<\/span>[] objects = { \"Hello\"<\/span>, \" \"<\/span>, \"World\"<\/span>, \"!\"<\/span> };\n\nvar<\/span> result = string<\/span>.Concat(objects);\nConsole.WriteLine(result);<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
Hello World!<\/code><\/span><\/pre>\n\n\n
Concat(Object)<\/h2>\n\n\n\n
This overload creates the string representation of a specified object:<\/p>\n\n\n
object<\/span> obj = 42<\/span>;\n\nvar<\/span> result = string<\/span>.Concat(obj);\nConsole.WriteLine(result);<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
42<\/code><\/span><\/pre>\n\n\n
Concat(IEnumerable<String>)<\/h2>\n\n\n\n
This overload concatenates the members of a constructed IEnumerable<String><\/code> collection:<\/p>\n\n\n
IEnumerable<string<\/span>> strings = new<\/span> List<string<\/span>> { \"Hello\"<\/span>, \" \"<\/span>, \"World\"<\/span>, \"!\"<\/span> };\n\nvar<\/span> result = string<\/span>.Concat(strings);\nConsole.WriteLine(result);<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
Hello World!<\/code><\/span><\/pre>\n\n\n
Concat(ReadOnlySpan<Char>, ReadOnlySpan<Char>)<\/h2>\n\n\n\n
This overload concatenates the string representations of two specified read-only character spans. For example:<\/p>\n\n\n
ReadOnlySpan<char<\/span>> span1 = \"Hello\"<\/span>.AsSpan();\r\nReadOnlySpan<char<\/span>> span2 = \"World\"<\/span>.AsSpan();\r\n\r\nvar<\/span> result = string<\/span>.Concat(span1, span2);\r\nConsole.WriteLine(result);\r<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
HelloWorld<\/code><\/span><\/pre>\n\n\n
Concat<T>(IEnumerable<T>)<\/h2>\n\n\n\n
This overload concatenates the members of an IEnumerable<T><\/code> implementation. For example:<\/p>\n\n\n
IEnumerable<int<\/span>> numbers = new<\/span> List<int<\/span>> { 1<\/span>, 2<\/span>, 3<\/span>, 4<\/span>, 5<\/span> };\r\n\r\nvar<\/span> result = string<\/span>.Concat(numbers);\n\r\nConsole.WriteLine(result);<\/code><\/span>Code language:<\/span> C#<\/span> (<\/span>cs<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
12345<\/code><\/span><\/pre>\n\n\n
Summary<\/h2>\n\n\n\n
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  • Use C# string Concat()<\/code> method to concatenate two or more strings into one string.<\/li>\n<\/ul>\n
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