Boolean.Parse() Method in C#

The Boolean.Parse() method in C# is used to convert the specified string representation of a logical value to its Boolean equivalent. This method converts strings like "true", "false", "TRUE", or "FALSE" to their corresponding boolean values.

Syntax

Following is the syntax −

public static bool Parse(string value);

Parameters

• value − A string containing the value to convert. It can be "true", "false", "True", "False", "TRUE", or "FALSE".

Return Value

Returns true if the value is equivalent to TrueString, or false if the value is equivalent to FalseString.

Using Boolean.Parse() with String Literals

Example

using System;

public class Demo {
   public static void Main() {
      bool b1 = bool.Parse("FALSE");
      bool b2 = bool.Parse("true");
      bool b3 = bool.Parse("True");
      bool b4 = bool.Parse("FALSE");
      
      Console.WriteLine("Parsing 'FALSE': " + b1);
      Console.WriteLine("Parsing 'true': " + b2);
      Console.WriteLine("Parsing 'True': " + b3);
      Console.WriteLine("Parsing 'FALSE': " + b4);
   }
}

The output of the above code is −

Parsing 'FALSE': False
Parsing 'true': True
Parsing 'True': True
Parsing 'FALSE': False

Using Boolean.Parse() with TrueString and FalseString

Example

using System;

public class Demo {
   public static void Main() {
      bool b1 = bool.Parse(bool.TrueString);
      bool b2 = bool.Parse(bool.FalseString);
      
      Console.WriteLine("TrueString value: " + bool.TrueString);
      Console.WriteLine("FalseString value: " + bool.FalseString);
      Console.WriteLine("Parsing TrueString: " + b1);
      Console.WriteLine("Parsing FalseString: " + b2);
   }
}

The output of the above code is −

TrueString value: True
FalseString value: False
Parsing TrueString: True
Parsing FalseString: False

Handling Parse Exceptions

The Boolean.Parse() method throws a FormatException if the input string is not a valid boolean representation −

Example

using System;

public class Demo {
   public static void Main() {
      string[] values = {"true", "false", "invalid", "1", "0"};
      
      foreach (string value in values) {
         try {
            bool result = bool.Parse(value);
            Console.WriteLine("'{0}' parsed successfully: {1}", value, result);
         }
         catch (FormatException) {
            Console.WriteLine("'{0}' - Invalid format for Boolean.Parse()", value);
         }
      }
   }
}

The output of the above code is −

'true' parsed successfully: True
'false' parsed successfully: False
'invalid' - Invalid format for Boolean.Parse()
'1' - Invalid format for Boolean.Parse()
'0' - Invalid format for Boolean.Parse()

Boolean.Parse() vs Boolean.TryParse()

Conclusion

The Boolean.Parse() method converts valid string representations like "true" or "false" to boolean values. It throws a FormatException for invalid inputs, so use Boolean.TryParse() when you need safer parsing without exceptions.