Why does Boolean ToString output True and not true

Question

true ToString    false toString     Output  True False   Is there a valid reason for it being  True  and not  true   It breaks when writing XML as XML s boolean type is lower case  and also isn t compatible with C  s true false  not sure about CLS though    Update  Here is my very hacky way of getting around it in C   for use with XML   internal static string ToXmlString this bool b        return b ToString   ToLower        Of course that adds 1 more method to the stack  but removes ToLowers   everywhere

User · Answer

because the  NET environment is designed to support many languages   System Boolean  in mscorlib dll  is designed to be used internally by languages to support a boolean datatype  C  uses all lowercase for its keywords  hence  bool    true   and  false    VB NET however uses standard casing  hence  Boolean    True   and  False    Since the languages have to work together  you couldn t have true ToString    C   giving a different result to True ToString    VB NET   The CLR designers picked the standard CLR casing notation for the ToString   result   The string representation of the boolean true is defined to be Boolean TrueString    There s a similar case with System String  C  presents it as the  string  type

User · Answer

This probably harks from the old VB NOT  Net days when bool ToString produced True or False

User · Answer

For Xml you can use XmlConvert ToString method

User · Answer

How is it not compatible with C   Boolean Parse and Boolean TryParse is case insensitive and the parsing is done by comparing the value to Boolean TrueString or Boolean FalseString which are  True  and  False     EDIT  When looking at the Boolean ToString method in reflector it turns out that the strings are hard coded so the ToString method is as follows   public override string ToString         if   this                return  False             return  True

User · Answer

How is it not compatible with C   Boolean Parse and Boolean TryParse is case insensitive and the parsing is done by comparing the value to Boolean TrueString or Boolean FalseString which are  True  and  False     EDIT  When looking at the Boolean ToString method in reflector it turns out that the strings are hard coded so the ToString method is as follows   public override string ToString         if   this                return  False             return  True

User · Answer

It s simple code to convert that to all lower case   Not so simple to convert  true  back to  True   however   true ToString   ToLower      is what I use for xml output

User · Answer

The reason true is  True  is because of Microsoft s strong bond with XML standards   From Wikipedia   Extensible Markup Language  XML  is a markup language that defines a set of rules for encoding documents in a format which is both human-readable and machine-readable    Human-readable is subjective  but in the eyes of XML  using the word  One  in place of a number  1  is preferred  You ll notice this happens using enums  as the word gets serialized instead of its value   FirstOption  instead of  0  or  1     Likewise  text commonly follows CamelCasing  Therefore  instead of  string   XML prefers  String   This is why Boolean TrueString is  True  and Boolean FalseString is  False  by default

User · Answer

Only people from Microsoft can really answer that question  However  I d like to offer some fun facts about it     First  this is what it says in MSDN about the Boolean ToString   method      Return Value      Type  System String      TrueString if the value of this   instance is true  or FalseString if   the value of this instance is false        Remarks      This method returns the   constants  True  or  False   Note that   XML is case-sensitive  and that the   XML specification recognizes  true    and  false  as the valid set of   Boolean values  If the String object   returned by the ToString   method   is to be written to an XML file  its   String ToLower method should be   called first to convert it to   lowercase    Here comes the fun fact  1  it doesn t return TrueString or FalseString at all  It uses hardcoded literals  True  and  False   Wouldn t do you any good if it used the fields  because they re marked as readonly  so there s no changing them   The alternative method  Boolean ToString IFormatProvider  is even funnier      Remarks      The provider parameter is reserved  It does not participate in the execution of this method  This means that the Boolean ToString IFormatProvider  method  unlike most methods with a provider parameter  does not reflect culture-specific settings     What s the solution  Depends on what exactly you re trying to do  Whatever it is  I bet it will require a hack

User · Answer

This probably harks from the old VB NOT  Net days when bool ToString produced True or False

User · Answer

Only people from Microsoft can really answer that question  However  I d like to offer some fun facts about it     First  this is what it says in MSDN about the Boolean ToString   method      Return Value      Type  System String      TrueString if the value of this   instance is true  or FalseString if   the value of this instance is false        Remarks      This method returns the   constants  True  or  False   Note that   XML is case-sensitive  and that the   XML specification recognizes  true    and  false  as the valid set of   Boolean values  If the String object   returned by the ToString   method   is to be written to an XML file  its   String ToLower method should be   called first to convert it to   lowercase    Here comes the fun fact  1  it doesn t return TrueString or FalseString at all  It uses hardcoded literals  True  and  False   Wouldn t do you any good if it used the fields  because they re marked as readonly  so there s no changing them   The alternative method  Boolean ToString IFormatProvider  is even funnier      Remarks      The provider parameter is reserved  It does not participate in the execution of this method  This means that the Boolean ToString IFormatProvider  method  unlike most methods with a provider parameter  does not reflect culture-specific settings     What s the solution  Depends on what exactly you re trying to do  Whatever it is  I bet it will require a hack

User · Answer

For Xml you can use XmlConvert ToString method

User · Answer

How is it not compatible with C   Boolean Parse and Boolean TryParse is case insensitive and the parsing is done by comparing the value to Boolean TrueString or Boolean FalseString which are  True  and  False     EDIT  When looking at the Boolean ToString method in reflector it turns out that the strings are hard coded so the ToString method is as follows   public override string ToString         if   this                return  False             return  True

User · Answer

I know the reason why it is the way it is has already been addressed  but when it comes to  custom  boolean formatting  I ve got two extension methods that I can t live without anymore  -    public static class BoolExtensions       public static string ToString this bool  v  string trueString  string falseString  string nullString  Undefined             return v    null   nullString   v Value   trueString   falseString            public static string ToString this bool v  string trueString  string falseString            return ToString v  trueString  falseString  null             Usage is trivial  The following converts various bool values to their Portuguese representations   string verdadeiro   true ToString  verdadeiro    falso    string falso   false ToString  verdadeiro    falso    bool  v   null  string nulo   v ToString  verdadeiro    falso    nulo

User · Answer

I know the reason why it is the way it is has already been addressed  but when it comes to  custom  boolean formatting  I ve got two extension methods that I can t live without anymore  -    public static class BoolExtensions       public static string ToString this bool  v  string trueString  string falseString  string nullString  Undefined             return v    null   nullString   v Value   trueString   falseString            public static string ToString this bool v  string trueString  string falseString            return ToString v  trueString  falseString  null             Usage is trivial  The following converts various bool values to their Portuguese representations   string verdadeiro   true ToString  verdadeiro    falso    string falso   false ToString  verdadeiro    falso    bool  v   null  string nulo   v ToString  verdadeiro    falso    nulo

User · Answer

This probably harks from the old VB NOT  Net days when bool ToString produced True or False

User · Answer

It s simple code to convert that to all lower case   Not so simple to convert  true  back to  True   however   true ToString   ToLower      is what I use for xml output

User · Answer

because the  NET environment is designed to support many languages   System Boolean  in mscorlib dll  is designed to be used internally by languages to support a boolean datatype  C  uses all lowercase for its keywords  hence  bool    true   and  false    VB NET however uses standard casing  hence  Boolean    True   and  False    Since the languages have to work together  you couldn t have true ToString    C   giving a different result to True ToString    VB NET   The CLR designers picked the standard CLR casing notation for the ToString   result   The string representation of the boolean true is defined to be Boolean TrueString    There s a similar case with System String  C  presents it as the  string  type

User · Answer

For Xml you can use XmlConvert ToString method

User · Answer

Only people from Microsoft can really answer that question  However  I d like to offer some fun facts about it     First  this is what it says in MSDN about the Boolean ToString   method      Return Value      Type  System String      TrueString if the value of this   instance is true  or FalseString if   the value of this instance is false        Remarks      This method returns the   constants  True  or  False   Note that   XML is case-sensitive  and that the   XML specification recognizes  true    and  false  as the valid set of   Boolean values  If the String object   returned by the ToString   method   is to be written to an XML file  its   String ToLower method should be   called first to convert it to   lowercase    Here comes the fun fact  1  it doesn t return TrueString or FalseString at all  It uses hardcoded literals  True  and  False   Wouldn t do you any good if it used the fields  because they re marked as readonly  so there s no changing them   The alternative method  Boolean ToString IFormatProvider  is even funnier      Remarks      The provider parameter is reserved  It does not participate in the execution of this method  This means that the Boolean ToString IFormatProvider  method  unlike most methods with a provider parameter  does not reflect culture-specific settings     What s the solution  Depends on what exactly you re trying to do  Whatever it is  I bet it will require a hack

User · Answer

Only people from Microsoft can really answer that question  However  I d like to offer some fun facts about it     First  this is what it says in MSDN about the Boolean ToString   method      Return Value      Type  System String      TrueString if the value of this   instance is true  or FalseString if   the value of this instance is false        Remarks      This method returns the   constants  True  or  False   Note that   XML is case-sensitive  and that the   XML specification recognizes  true    and  false  as the valid set of   Boolean values  If the String object   returned by the ToString   method   is to be written to an XML file  its   String ToLower method should be   called first to convert it to   lowercase    Here comes the fun fact  1  it doesn t return TrueString or FalseString at all  It uses hardcoded literals  True  and  False   Wouldn t do you any good if it used the fields  because they re marked as readonly  so there s no changing them   The alternative method  Boolean ToString IFormatProvider  is even funnier      Remarks      The provider parameter is reserved  It does not participate in the execution of this method  This means that the Boolean ToString IFormatProvider  method  unlike most methods with a provider parameter  does not reflect culture-specific settings     What s the solution  Depends on what exactly you re trying to do  Whatever it is  I bet it will require a hack

User · Answer

How is it not compatible with C   Boolean Parse and Boolean TryParse is case insensitive and the parsing is done by comparing the value to Boolean TrueString or Boolean FalseString which are  True  and  False     EDIT  When looking at the Boolean ToString method in reflector it turns out that the strings are hard coded so the ToString method is as follows   public override string ToString         if   this                return  False             return  True

User · Answer

This probably harks from the old VB NOT  Net days when bool ToString produced True or False

User · Answer

It s simple code to convert that to all lower case   Not so simple to convert  true  back to  True   however   true ToString   ToLower      is what I use for xml output

User · Answer

It s simple code to convert that to all lower case   Not so simple to convert  true  back to  True   however   true ToString   ToLower      is what I use for xml output

User · Answer

because the  NET environment is designed to support many languages   System Boolean  in mscorlib dll  is designed to be used internally by languages to support a boolean datatype  C  uses all lowercase for its keywords  hence  bool    true   and  false    VB NET however uses standard casing  hence  Boolean    True   and  False    Since the languages have to work together  you couldn t have true ToString    C   giving a different result to True ToString    VB NET   The CLR designers picked the standard CLR casing notation for the ToString   result   The string representation of the boolean true is defined to be Boolean TrueString    There s a similar case with System String  C  presents it as the  string  type

User · Answer

For Xml you can use XmlConvert ToString method

User · Answer

The reason true is  True  is because of Microsoft s strong bond with XML standards   From Wikipedia   Extensible Markup Language  XML  is a markup language that defines a set of rules for encoding documents in a format which is both human-readable and machine-readable    Human-readable is subjective  but in the eyes of XML  using the word  One  in place of a number  1  is preferred  You ll notice this happens using enums  as the word gets serialized instead of its value   FirstOption  instead of  0  or  1     Likewise  text commonly follows CamelCasing  Therefore  instead of  string   XML prefers  String   This is why Boolean TrueString is  True  and Boolean FalseString is  False  by default

User · Answer

because the  NET environment is designed to support many languages   System Boolean  in mscorlib dll  is designed to be used internally by languages to support a boolean datatype  C  uses all lowercase for its keywords  hence  bool    true   and  false    VB NET however uses standard casing  hence  Boolean    True   and  False    Since the languages have to work together  you couldn t have true ToString    C   giving a different result to True ToString    VB NET   The CLR designers picked the standard CLR casing notation for the ToString   result   The string representation of the boolean true is defined to be Boolean TrueString    There s a similar case with System String  C  presents it as the  string  type

[c#] Why does Boolean.ToString output "True" and not "true"

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