fix exponential notation (#3635)

Author: mairaw

xml/System/Double.xml

@@ -3232,7 +3232,7 @@ If a separator is encountered in the `s` parameter during a parse operation, and
   
  The return value can be <xref:System.Globalization.NumberFormatInfo.PositiveInfinitySymbol%2A>, <xref:System.Globalization.NumberFormatInfo.NegativeInfinitySymbol%2A>, <xref:System.Globalization.NumberFormatInfo.NaNSymbol%2A>, or a string of the form:  
   
- [sign]integral-digits[.[fractional-digits]][e[sign]exponential-digits]  
+ [sign]integral-digits[.[fractional-digits]][E[sign]exponential-digits]  
   
  Optional elements are framed in square brackets ([ and ]). Elements that contain the term "digits" consist of a series of numeric characters ranging from 0 to 9. The elements listed in the following table are supported.  
   
@@ -3242,10 +3242,10 @@ If a separator is encountered in the `s` parameter during a parse operation, and
 |*integral-digits*|A series of digits specifying the integral part of the number. Integral-digits can be absent if there are fractional-digits.|  
 |'*.*'|A culture-specific decimal point symbol.|  
 |*fractional-digits*|A series of digits specifying the fractional part of the number.|  
-|'*e*'|A lowercase character 'e', indicating exponential (scientific) notation.|  
+|'*E*'|An uppercase character 'E', indicating exponential (scientific) notation.|  
 |*exponential-digits*|A series of digits specifying an exponent.|  
   
- Some examples of the return value are "100", "-123,456,789", "123.45e+6", "500", "3.1416", "600", "-0.123", and "-Infinity".  
+ Some examples of the return value are "100", "-123,456,789", "123.45E+6", "500", "3.1416", "600", "-0.123", and "-Infinity".  
   
  The .NET Framework provides extensive formatting support, which is described in greater detail in the following formatting topics:  
   
@@ -3337,7 +3337,7 @@ If a separator is encountered in the `s` parameter during a parse operation, and
   
  The return value can be <xref:System.Globalization.NumberFormatInfo.PositiveInfinitySymbol%2A>, <xref:System.Globalization.NumberFormatInfo.NegativeInfinitySymbol%2A>, <xref:System.Globalization.NumberFormatInfo.NaNSymbol%2A>, or a string of the form:  
   
- [sign]integral-digits[.[fractional-digits]][e[sign]exponential-digits]  
+ [sign]integral-digits[.[fractional-digits]][E[sign]exponential-digits]  
   
  Optional elements are framed in square brackets ([ and ]). Elements that contain the term "digits" consist of a series of numeric characters ranging from 0 to 9. The elements listed in the following table are supported.  
   
@@ -3347,10 +3347,10 @@ If a separator is encountered in the `s` parameter during a parse operation, and
 |*integral-digits*|A series of digits specifying the integral part of the number. Integral-digits can be absent if there are fractional-digits.|  
 |'*.*'|A culture-specific decimal point symbol.|  
 |*fractional-digits*|A series of digits specifying the fractional part of the number.|  
-|'*e*'|A lowercase character 'e', indicating exponential (scientific) notation.|  
+|'*E*'|An uppercase character 'E', indicating exponential (scientific) notation.|  
 |*exponential-digits*|A series of digits specifying an exponent.|  
   
- Some examples of the return value are "100", "-123,456,789", "123.45e+6", "500", "3.1416", "600", "-0.123", and "-Infinity".  
+ Some examples of the return value are "100", "-123,456,789", "123.45E+6", "500", "3.1416", "600", "-0.123", and "-Infinity".  
   
  This instance is formatted with the general numeric format specifier ("G").