Modernize C# code snippets - System/D* - #12948
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Pull request overview
Modernizes a large set of .NET API reference C# snippets under snippets/csharp/System (primarily System.D*) as part of issue #12713, updating code style to current C# conventions while keeping the samples’ instructional intent.
Changes:
- Replaced framework type names with C# built-in aliases (for example,
Double→double,Decimal→decimal) and updated related calls. - Migrated many
Console.WriteLinecalls to string interpolation and updated formatting/spacing for readability. - Normalized indentation/bracing and removed or simplified some constructs (for example, expression-bodied members, target-typed
new).
Reviewed changes
Copilot reviewed 203 out of 227 changed files in this pull request and generated 3 comments.
Show a summary per file
| File | Description |
|---|---|
| snippets/csharp/System/Double/TryParse/tryparse2.cs | Modernizes parsing snippet (aliases/interpolation/formatting). |
| snippets/csharp/System/Double/TryParse/tryparse1a.cs | Modernizes TryParse loop and output formatting. |
| snippets/csharp/System/Double/ToString/ToString7.cs | Modernizes numeric formatting snippet. |
| snippets/csharp/System/Double/ToString/roundtripex2.cs | Modernizes round-trip formatting output. |
| snippets/csharp/System/Double/ToString/roundtripex1.cs | Modernizes culture-aware round-trip snippet formatting. |
| snippets/csharp/System/Double/Parse/parse2.cs | Modernizes overflow-handling parse snippet formatting. |
| snippets/csharp/System/Double/Overview/representation2.cs | Uses built-in aliases and normalizes formatting. |
| snippets/csharp/System/Double/Overview/representation1.cs | Uses built-in aliases and normalizes formatting. |
| snippets/csharp/System/Double/Overview/precisionlist3.cs | Uses built-in aliases and explicit foreach typing. |
| snippets/csharp/System/Double/Overview/precision1.cs | Converts composite formatting to interpolation. |
| snippets/csharp/System/Double/Overview/exceptional2.cs | Uses built-in aliases for double APIs. |
| snippets/csharp/System/Double/Overview/exceptional1.cs | Uses built-in aliases and minor formatting updates. |
| snippets/csharp/System/Double/Overview/convert2.cs | Uses built-in aliases and explicit foreach typing. |
| snippets/csharp/System/Double/Overview/convert1.cs | Uses built-in aliases in numeric type list. |
| snippets/csharp/System/Double/Overview/comparison4.cs | Uses built-in aliases in double helper calls. |
| snippets/csharp/System/Double/Overview/comparison1.cs | Normalizes spacing and formatting. |
| snippets/csharp/System/Double/NaN/nan1.cs | Modernizes output formatting and aliases. |
| snippets/csharp/System/Double/NaN/double.nan4.cs | Modernizes output formatting and aliases. |
| snippets/csharp/System/Double/MinValue/minvalueex.cs | Converts output formatting to interpolation and aliases. |
| snippets/csharp/System/Double/MaxValue/maxvalueex.cs | Converts output formatting to interpolation and aliases. |
| snippets/csharp/System/Double/Epsilon/epsilon1.cs | Uses aliases and updates string formatting style. |
| snippets/csharp/System/Double/Epsilon/epsilon.cs | Uses aliases and normalizes loop formatting. |
| snippets/csharp/System/DivideByZeroException/Overview/exception2.cs | Normalizes indentation/formatting. |
| snippets/csharp/System/DivideByZeroException/Overview/exception1.cs | Converts output to interpolation and normalizes try/catch formatting. |
| snippets/csharp/System/Delegate/CreateDelegate/source.cs | Applies expression-bodied members, target-typed new, and interpolation. |
| snippets/csharp/System/Delegate/CreateDelegate/openClosedOver.cs | Applies expression-bodied members, target-typed new, and interpolation. |
| snippets/csharp/System/Decimal/ToUInt64/touint64_1.cs | Uses decimal alias, explicit foreach typing, and interpolation. |
| snippets/csharp/System/Decimal/ToUInt32/touint32_1.cs | Uses decimal alias, explicit foreach typing, and interpolation. |
| snippets/csharp/System/Decimal/ToUInt16/touint16_1.cs | Uses decimal alias, explicit foreach typing, and interpolation. |
| snippets/csharp/System/Decimal/ToSByte/tosbyte1.cs | Uses decimal alias, explicit foreach typing, and interpolation. |
| snippets/csharp/System/Decimal/ToInt64/toint64_1.cs | Uses decimal alias, explicit foreach typing, and interpolation. |
| snippets/csharp/System/Decimal/ToInt32/toint32_1.cs | Uses decimal alias, explicit foreach typing, and interpolation. |
| snippets/csharp/System/Decimal/ToInt16/toint16_1.cs | Uses decimal alias, explicit foreach typing, and interpolation. |
| snippets/csharp/System/Decimal/ToDouble/tosgl_dbl.cs | Normalizes spacing/formatting and call style. |
| snippets/csharp/System/Decimal/ToByte/tobyte_1.cs | Uses decimal alias, explicit foreach typing, and interpolation. |
| snippets/csharp/System/Decimal/Round/single1.cs | Uses built-in aliases and converts output to interpolation. |
| snippets/csharp/System/Decimal/Round/Round2.cs | Uses built-in aliases and interpolated header/rows. |
| snippets/csharp/System/Decimal/Round/Round12.cs | Uses built-in aliases and interpolated header/rows. |
| snippets/csharp/System/Decimal/Round/Round1.cs | Uses built-in aliases and interpolation. |
| snippets/csharp/System/Decimal/Round/Program.cs | Simplifies Main to expression-bodied form. |
| snippets/csharp/System/Decimal/Round/precision2.cs | Converts header formatting and normalizes indentation. |
| snippets/csharp/System/Decimal/Round/precision1.cs | Converts header formatting and normalizes indentation. |
| snippets/csharp/System/Decimal/Round/midpoint2.cs | Uses double alias and explicit foreach typing. |
| snippets/csharp/System/Decimal/Round/mean1.cs | Uses explicit foreach typing and interpolation. |
| snippets/csharp/System/Decimal/Remainder/remainder.cs | Uses aliases and converts composite formatting to interpolation. |
| snippets/csharp/System/Decimal/Overview/DecimalDivision_46630_1.cs | Uses aliases and normalizes spacing/formatting. |
| snippets/csharp/System/Decimal/op_Implicit/cfromuint64.cs | Uses explicit foreach typing and interpolation. |
| snippets/csharp/System/Decimal/op_Implicit/cfromuint32.cs | Uses explicit foreach typing and interpolation. |
| snippets/csharp/System/Decimal/op_Implicit/cfromuint16.cs | Uses explicit foreach typing and interpolation. |
| snippets/csharp/System/Decimal/op_Implicit/cfromsbyte.cs | Uses explicit foreach typing and interpolation. |
| snippets/csharp/System/Decimal/op_Implicit/cfromint64.cs | Uses explicit foreach typing and interpolation. |
| snippets/csharp/System/Decimal/op_Implicit/cfromint32.cs | Uses explicit foreach typing and interpolation. |
| snippets/csharp/System/Decimal/op_Implicit/cfromint16.cs | Uses explicit foreach typing and interpolation. |
| snippets/csharp/System/Decimal/op_Implicit/cfrombyte.cs | Uses explicit foreach typing and interpolation. |
| snippets/csharp/System/Decimal/op_Explicit/tosingle1.cs | Uses explicit foreach typing and interpolation. |
| snippets/csharp/System/Decimal/op_Explicit/tosbyte.cs | Uses aliases, explicit foreach typing, and interpolation. |
| snippets/csharp/System/Decimal/op_Explicit/ctosgl_dbl.cs | Uses explicit foreach typing and interpolation. |
| snippets/csharp/System/Decimal/op_Explicit/ctos_byte.cs | Uses aliases, explicit foreach typing, and interpolation. |
| snippets/csharp/System/Decimal/op_Explicit/ctochar.cs | Uses explicit foreach typing and interpolation. |
| snippets/csharp/System/Decimal/op_Explicit/cfromsingle.cs | Normalizes spacing and call style. |
| snippets/csharp/System/Decimal/op_Explicit/cfromdouble.cs | Normalizes spacing and call style. |
| snippets/csharp/System/Decimal/op_Explicit/cfromchar.cs | Uses char alias, explicit foreach typing, and interpolation. |
| snippets/csharp/System/Decimal/op_Addition/subtraction1.cs | Uses aliases and interpolation for output. |
| snippets/csharp/System/Decimal/op_Addition/multiply1.cs | Uses aliases and interpolation for output. |
| snippets/csharp/System/Decimal/op_Addition/modulus1.cs | Uses aliases and interpolation for output. |
| snippets/csharp/System/Decimal/op_Addition/lessthanorequal1.cs | Uses aliases and interpolation for output. |
| snippets/csharp/System/Decimal/op_Addition/lessthan1.cs | Uses aliases and interpolation for output. |
| snippets/csharp/System/Decimal/op_Addition/inequality1.cs | Uses aliases and interpolation for output. |
| snippets/csharp/System/Decimal/op_Addition/increment2.cs | Uses aliases and interpolation for output. |
| snippets/csharp/System/Decimal/op_Addition/increment1.cs | Uses aliases and interpolation for output. |
| snippets/csharp/System/Decimal/op_Addition/greaterthanorequal1.cs | Uses aliases and interpolation for output. |
| snippets/csharp/System/Decimal/op_Addition/greaterthan1.cs | Uses aliases and interpolation for output. |
| snippets/csharp/System/Decimal/op_Addition/equality1.cs | Uses aliases and interpolation for output. |
| snippets/csharp/System/Decimal/op_Addition/division1.cs | Uses aliases and interpolation for output. |
| snippets/csharp/System/Decimal/op_Addition/decrement2.cs | Uses aliases and interpolation for output. |
| snippets/csharp/System/Decimal/op_Addition/decrement1.cs | Uses aliases and interpolation for output. |
| snippets/csharp/System/Decimal/op_Addition/addition1.cs | Uses aliases and interpolation for output. |
| snippets/csharp/System/Decimal/Negate/round.cs | Normalizes spacing and call style. |
| snippets/csharp/System/Decimal/Negate/floor_neg_trunc.cs | Normalizes spacing and call style. |
| snippets/csharp/System/Decimal/Multiply/mul_div_rem.cs | Removes unused Microsoft.VisualBasic import and modernizes formatting. |
| snippets/csharp/System/Decimal/Multiply/mul_div_rem_ops.cs | Normalizes spacing and call style. |
| snippets/csharp/System/Decimal/MinusOne/fields.cs | Uses decimal alias and interpolated formatting where applicable. |
| snippets/csharp/System/Decimal/GetBits/gettypecode.cs | Uses target-typed new and interpolation. |
| snippets/csharp/System/Decimal/GetBits/getbits.cs | Uses decimal alias and interpolated tabular output. |
| snippets/csharp/System/Decimal/FromOACurrency/fromoacurrency.cs | Normalizes spacing and call style. |
| snippets/csharp/System/Decimal/Divide/Divide1.cs | Uses aliases and interpolation for loop output. |
| snippets/csharp/System/Decimal/CompareTo/comp_equal.cs | Uses aliases/spacing normalization and preserves sample semantics. |
| snippets/csharp/System/Decimal/Compare/Compare1.cs | Uses decimal alias and normalizes indentation. |
| snippets/csharp/System/Decimal/Ceiling/ceiling1.cs | Uses interpolation for table-like output. |
| snippets/csharp/System/Decimal/.ctor/ctorul.cs | Uses target-typed new and interpolation for output formatting. |
| snippets/csharp/System/Decimal/.ctor/ctorui.cs | Uses target-typed new and interpolation for output formatting. |
| snippets/csharp/System/Decimal/.ctor/ctorl.cs | Uses target-typed new and interpolation for output formatting. |
| snippets/csharp/System/Decimal/.ctor/ctori.cs | Uses target-typed new and interpolation for output formatting. |
| snippets/csharp/System/Decimal/.ctor/ctor2a.cs | Uses decimal alias, explicit foreach typing, and target-typed new. |
| snippets/csharp/System/DateTimeOffset/ToString/datetimeoffset.tostring.argumentoutofrangeexception4.cs | Uses target-typed new, updated try/catch formatting, and interpolation. |
| snippets/csharp/System/DateTimeOffset/ToString/datetimeoffset.tostring.argumentoutofrangeexception3.cs | Uses target-typed new, updated try/catch formatting, and interpolation. |
| snippets/csharp/System/DateTimeOffset/ToString/datetimeoffset.tostring.argumentoutofrangeexception2.cs | Uses target-typed new, updated try/catch formatting, and interpolation. |
| snippets/csharp/System/DateTimeOffset/ToString/datetimeoffset.tostring.argumentoutofrangeexception1.cs | Uses target-typed new, updated try/catch formatting, and interpolation. |
| snippets/csharp/System/DateTimeOffset/ToOffset/ToOffset.cs | Uses target-typed new and interpolation for output. |
| snippets/csharp/System/DateTimeOffset/ParseExact/parseexact-iso8601.cs | Normalizes foreach typing and try/catch formatting. |
| snippets/csharp/System/DateTimeOffset/Overview/Type.cs | Converts composite formatting to interpolation and normalizes indentation. |
| snippets/csharp/System/DateTimeOffset/Now/now1.cs | Uses string alias, explicit foreach typing, and interpolation. |
| snippets/csharp/System/DateTime/Year/Year.cs | Uses target-typed new and normalizes indentation. |
| snippets/csharp/System/DateTime/TryParseExact/TryParseExact2.cs | Converts output to interpolation and normalizes indentation. |
| snippets/csharp/System/DateTime/TryParse/TryParse1.cs | Converts output to interpolation and normalizes indentation. |
| snippets/csharp/System/DateTime/ToString/tostring5.cs | Uses target-typed new and explicit foreach typing. |
| snippets/csharp/System/DateTime/ToString/ToString2.cs | Converts output to interpolation and normalizes indentation. |
| snippets/csharp/System/DateTime/ToString/ToString1.cs | Uses target-typed new. |
| snippets/csharp/System/DateTime/ToString/source.cs | Uses string alias for format array. |
| snippets/csharp/System/DateTime/ToString/datetime.tostring.argumentoutofrangeexception4.cs | Uses target-typed new and interpolation in error output. |
| snippets/csharp/System/DateTime/ToString/datetime.tostring.argumentoutofrangeexception3.cs | Uses target-typed new and interpolation in error output. |
| snippets/csharp/System/DateTime/ToString/datetime.tostring.argumentoutofrangeexception2.cs | Uses target-typed new and interpolation in error output. |
| snippets/csharp/System/DateTime/ToString/datetime.tostring.argumentoutofrangeexception1.cs | Uses target-typed new and interpolation in error output. |
| snippets/csharp/System/DateTime/ToShortDateString/ToShortDateString.cs | Uses target-typed new and interpolation for output text. |
| snippets/csharp/System/DateTime/ToLongTimeString/sls.cs | Uses string alias, target-typed new, and interpolation. |
| snippets/csharp/System/DateTime/ToLongDateString/sls.cs | Uses target-typed new. |
| snippets/csharp/System/DateTime/ToLocalTime/tolocaltime1.cs | Converts output to interpolation and uses target-typed new. |
| snippets/csharp/System/DateTime/ToLocalTime/class1.cs | Normalizes indentation and modernizes output formatting. |
| snippets/csharp/System/DateTime/ToFileTime/class1.cs | Normalizes indentation and modernizes output formatting. |
| snippets/csharp/System/DateTime/Today/Today1.cs | Normalizes indentation. |
| snippets/csharp/System/DateTime/TimeOfDay/timeofday1.cs | Converts one output line to interpolation and normalizes indentation. |
| snippets/csharp/System/DateTime/Ticks/Ticks.cs | Uses target-typed new and interpolation for multi-line output. |
| snippets/csharp/System/DateTime/ParseExact/parseexact3.cs | Converts output to interpolation and normalizes try/catch formatting. |
| snippets/csharp/System/DateTime/Parse/Parse6.cs | Normalizes tuple-array formatting and foreach formatting. |
| snippets/csharp/System/DateTime/Parse/Parse3.cs | Converts output to interpolation and normalizes try/catch structure. |
| snippets/csharp/System/DateTime/Parse/Parse2.cs | Normalizes indentation and output formatting. |
| snippets/csharp/System/DateTime/Overview/Resolution.cs | Simplifies wrapper method and updates formatting code. |
| snippets/csharp/System/DateTime/Overview/Persistence.cs | Uses target-typed new and explicit foreach typing in IO sections. |
| snippets/csharp/System/DateTime/Overview/Parsing.cs | Uses string alias in generics/locals and explicit foreach typing. |
| snippets/csharp/System/DateTime/Overview/Instantiation.cs | Uses explicit string locals for sample inputs. |
| snippets/csharp/System/DateTime/Overview/DateTimeComparisons.cs | Removes unused usings and simplifies wrapper method. |
| snippets/csharp/System/DateTime/Overview/Calendar.cs | Fixes spacing in argument list. |
| snippets/csharp/System/DateTime/op_Subtraction/class1.cs | Normalizes indentation and modernizes constructor style. |
| snippets/csharp/System/DateTime/op_Addition/class1.cs | Normalizes indentation and modernizes constructor style. |
| snippets/csharp/System/DateTime/Now/now2.cs | Uses string alias and converts output to interpolation. |
| snippets/csharp/System/DateTime/Now/now1.cs | Uses string alias and converts output to interpolation. |
| snippets/csharp/System/DateTime/Millisecond/Millisecond.cs | Uses target-typed new and interpolation. |
| snippets/csharp/System/DateTime/MaxValue/MinValue.cs | Uses target-typed new, aliases, and interpolation. |
| snippets/csharp/System/DateTime/Kind/ks.cs | Converts composite formatting to interpolation. |
| snippets/csharp/System/DateTime/IsLeapYear/IsLeapYear1.cs | Converts composite formatting to interpolation. |
| snippets/csharp/System/DateTime/Hour/Hour1.cs | Uses target-typed new and normalizes comment indentation. |
| snippets/csharp/System/DateTime/FromFileTime/fromfiletime1.cs | Uses target-typed new and interpolation. |
| snippets/csharp/System/DateTime/FromFileTime/class1.cs | Uses target-typed new and modernizes try/catch formatting. |
| snippets/csharp/System/DateTime/FromBinary/frombinary1.cs | Uses target-typed new and interpolation. |
| snippets/csharp/System/DateTime/Equals/sample.cs | Converts composite formatting to interpolation. |
| snippets/csharp/System/DateTime/Equals/class1.cs | Uses target-typed new and normalizes indentation. |
| snippets/csharp/System/DateTime/DaysInMonth/daysinmonth3.cs | Uses interpolation for headers/rows and explicit foreach typing. |
| snippets/csharp/System/DateTime/DaysInMonth/class1.cs | Normalizes indentation. |
| snippets/csharp/System/DateTime/DayOfYear/dayofyear2.cs | Converts output to interpolation and normalizes indentation. |
| snippets/csharp/System/DateTime/DayOfWeek/dow.cs | Normalizes indentation and converts output to interpolation. |
| snippets/csharp/System/DateTime/Day/Day2.cs | Uses target-typed new and normalizes indentation. |
| snippets/csharp/System/DateTime/Day/Day1.cs | Uses target-typed new and normalizes indentation. |
| snippets/csharp/System/DateTime/Day/class1.cs | Uses target-typed new and normalizes indentation. |
| snippets/csharp/System/DateTime/Date/Date1.cs | Uses target-typed new and normalizes indentation. |
| snippets/csharp/System/DateTime/CompareTo/CompareTo_CS1_24564.cs | Converts composite formatting to interpolation and normalizes indentation. |
| snippets/csharp/System/DateTime/CompareTo/class1.cs | Uses target-typed new and converts output to interpolation. |
| snippets/csharp/System/DateTime/Compare/compare1.cs | Uses target-typed new and converts output to interpolation. |
| snippets/csharp/System/DateTime/AddYears/addyears1.cs | Uses target-typed new and interpolation for output lines. |
| snippets/csharp/System/DateTime/AddSeconds/addseconds1.cs | Converts composite formatting to interpolation and normalizes indentation. |
| snippets/csharp/System/DateTime/AddMonths/addmonths1.cs | Normalizes indentation (retains existing sample structure). |
| snippets/csharp/System/DateTime/AddMinutes/addminutes1.cs | Uses target-typed new and interpolation. |
| snippets/csharp/System/DateTime/AddMilliseconds/addmilliseconds2.cs | Converts composite formatting to interpolation and normalizes indentation. |
| snippets/csharp/System/DateTime/AddHours/AddHours1.cs | Uses target-typed new and interpolation. |
| snippets/csharp/System/DateTime/AddDays/class1.cs | Converts output to interpolation and normalizes indentation. |
| snippets/csharp/System/DateTime/Add/class1.cs | Uses target-typed new and interpolation. |
| snippets/csharp/System/DateTime/.ctor/ticks.cs | Normalizes indentation and updates output formatting. |
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
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Contributes to #12713.
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