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C#/.NET - replace last char in string

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3 points

In C#/.NET it is possible to replace last char in string in few ways.

1. string.Substring example

string text = "abc";
string to = "D";

string result = text.Substring(0, text.Length - 1) + to;

Console.WriteLine(result);

Output:

abD

2. Regex.Replace example

string text = "abc";
string to = "D";

Regex expression = new Regex(".$");
string result = expression.Replace(text, to);

Console.WriteLine(result);

Output:

abD

3. References

  1. String.Substring - Microsoft Docs
  2. Regex - Microsoft Docs
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