Remove first character of a string in C#

This article illustrates the different techniques to remove the first character from a string in C#.

1. Using Range Operator

Starting from C# 8, we can use the range operator to remove the first character from a string in C#. The range operator takes the start and the end from a range as its operands, and can be used as follows to remove the first character from a string.

using System;

public class Example

{

public static void Main()

{

String s = "ABCD";

s = s[1..];

Console.WriteLine(s); // BCD

}

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2. Using `String.Substring()` method

Another option is to use the String.Substring() method, which can create a substring of a string starting from the second position till its end. The following code example shows how to use this option:

using System;

public class Example

{

public static void Main()

{

String s = "ABCD";

s = s.Substring(1);

Console.WriteLine(s); // BCD

}

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3. Using `String.TrimStart()` method

Finally, you can use the String.TrimStart() method to remove all occurrences of a specific character from the beginning of a string. For example, the following code removes all instances of the dot character (.) from the start of a string.

using System;

public class Example

{

public static void Main()

{

String s = "..Hello";

s = s.TrimStart('.');

Console.WriteLine(s); // Hello

}

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4. Using `String.Remove()` method

However, if you need to remove only the first occurrence of a character from any position in the string, you can find its index and pass the index to the String.Remove() method. The following example demonstrates its usage.

using System;

public class Example

{

public static void Main()

{

String s = "H..Hello";

int firstIdx = s.IndexOf('.');

s = s.Remove(firstIdx, 1);

Console.WriteLine(s); // H.Hello

}

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That’s all about removing the first character of a string in C#.

Remove first character of a string in C#

1. Using Range Operator

2. Using String.Substring() method

3. Using String.TrimStart() method

4. Using String.Remove() method

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2. Using `String.Substring()` method

3. Using `String.TrimStart()` method

4. Using `String.Remove()` method