C# / .NET - replace last character in string

In C#/.NET it is possible to replace last character 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

Note:

Duplicated article: C# / .NET - replace last char in string

In the future, combine these 2 articles into one.

References

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