C# String - StartsWith() Method

The C# StartsWith() method is used to check whether the string starts with specified value or not. It returns true if the string starts with the specified value, else returns false.

Note: This method can be overloaded by passing different type of arguments to it.

Syntax

public bool StartsWith(char value);
public bool StartsWith(string value);
public bool StartsWith(string value, StringComparison comparisonType);
public bool StartsWith(string value, bool ignoreCase, 
                       System.Globalization.CultureInfo culture);

Parameters

Return Value

Returns true if the string starts with the specified value, else returns false.

Exception

• Throws ArgumentNullException, if the value is null.
• Throws ArgumentException, if the comparisonType is not a StringComparison value.

Example:

In the example below, StartsWith() method is used to check whether the string starts with specified value or not.

using System;
using System.Globalization;

class MyProgram {
  static void Main(string[] args) {
    string MyStr = "HELLO World";

    Console.WriteLine(MyStr.StartsWith("Hello"));

    Console.WriteLine(MyStr.StartsWith("Hello", 
          StringComparison.CurrentCultureIgnoreCase)); 

    Console.WriteLine(MyStr.StartsWith("Hello", true, 
          new CultureInfo("en-US"))); 
  }
}

The output of the above code will be:

False
True
True