24UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(langVersion)); 71UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(langVersion)); 142UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(langVersion), 244UsingDeclaration(source, TestOptions.Regular11); 276UsingDeclaration(source, TestOptions.Regular11, 498UsingDeclaration(source, TestOptions.Regular11, 547UsingDeclaration(source, TestOptions.Regular11, 598UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(langVersion), 683UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(langVersion)); 746UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(langVersion), 800UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(langVersion)); 840UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(langVersion), 1304UsingDeclaration(source, TestOptions.Regular11, 1364UsingDeclaration(source, TestOptions.Regular11);

773UsingDeclaration("""Func<string, string> func1 = x!! => x + "1";""", options: TestOptions.RegularPreview, 829UsingDeclaration("Func<int, int, bool> func1 = (x!!, y) => x == y;", options: TestOptions.RegularPreview, 906UsingDeclaration("Func<int, int> func1 = (x!!) => x;", options: TestOptions.RegularPreview, 967UsingDeclaration("Func<int, int> func1 = x!!=>x;", options: TestOptions.RegularPreview, 1035UsingDeclaration("Func<int, int> func1 = (int x!!) => x;", options: TestOptions.RegularPreview, 1094UsingDeclaration("Func<int, int, int> func1 = (int x!!, int y) => x;", options: TestOptions.RegularPreview, 1169UsingDeclaration("Func<int, int, int> func1 = (int x!!, int y!!) => x;", options: TestOptions.RegularPreview, 1244UsingDeclaration("Func<int> func1 = (!!) => 42;", options: TestOptions.RegularPreview, 1303UsingDeclaration("Func<int, int> func1 = (_!!) => 42;", options: TestOptions.RegularPreview, 1364UsingDeclaration("Func<string, string> func0 = x!=> x;", options: TestOptions.RegularPreview, 1428UsingDeclaration("Func<string, string> func1 = x !=> x;", options: TestOptions.RegularPreview, 1492UsingDeclaration("Func<string, string> func2 = x != > x;", options: TestOptions.RegularPreview, 1556UsingDeclaration("Func<string, string> func3 = x! => x;", options: TestOptions.RegularPreview, 1606UsingDeclaration("Func<string, string> func4 = x ! => x;", options: TestOptions.RegularPreview, 1656UsingDeclaration("Func<string, string> func5 = x !!=> x;", options: TestOptions.RegularPreview, 1724UsingDeclaration("Func<string, string> func6 = x !!= > x;", options: TestOptions.RegularPreview, 1792UsingDeclaration("Func<string, string> func7 = x!! => x;", options: TestOptions.RegularPreview, 1848UsingDeclaration("Func<string, string> func8 = x! !=> x;", options: TestOptions.RegularPreview, 1916UsingDeclaration("Func<string, string> func9 = x! ! => x;", options: TestOptions.RegularPreview, 1972UsingDeclaration("Func<string[], string> func0 = x[] => x;", options: TestOptions.RegularPreview, 2049UsingDeclaration("Func<string[], string> func0 = (x[]) => x;", options: TestOptions.RegularPreview, 2137UsingDeclaration("Func<string[], string> func0 = (string x[]) => x;", options: TestOptions.RegularPreview, 2207UsingDeclaration("Func<string, string> func0 = x = null => x;", options: TestOptions.RegularPreview, 2262UsingDeclaration("var f = int x = 3 => x;", 4326UsingDeclaration("Func<string, string> func0 = x!! = null => x;", options: TestOptions.RegularPreview, 4389UsingDeclaration("Func<string, string> func0 = (x!! = null) => x;", options: TestOptions.RegularPreview, 4458UsingDeclaration("Func<string, string> func0 = (y, x!! = null) => x;", options: TestOptions.RegularPreview, 4538UsingDeclaration("Func<string, string> func0 = (string x!! = null) => x;", options: TestOptions.RegularPreview, 4597UsingDeclaration("Func<string, string> func0 = (string y, string x!! = null) => x;", options: TestOptions.RegularPreview, 4752UsingDeclaration("Func<string, string> func0 = x! ! => x;", options: TestOptions.RegularPreview, 4808UsingDeclaration("Func<string, string> func0 = (x! !) => x;", options: TestOptions.RegularPreview, 4869UsingDeclaration("Func<string, string> func0 = (y, x! !) => x;", options: TestOptions.RegularPreview, 4941UsingDeclaration("Func<string, string> func0 = (string x! !) => x;", options: TestOptions.RegularPreview, 5000UsingDeclaration("Func<string, string> func0 = (string y, string x! !) => x;", options: TestOptions.RegularPreview,

5059UsingDeclaration(source, TestOptions.Regular9); 5272UsingDeclaration(source, parseOptions);

1736UsingDeclaration(text, options: TestOptions.Regular7_3); 1739UsingDeclaration(text, options: TestOptions.Regular8); 1742UsingDeclaration(text, options: TestOptions.Regular9); 1851UsingDeclaration(text, options: TestOptions.Regular7_3); 1854UsingDeclaration(text, options: TestOptions.Regular8); 1857UsingDeclaration(text, options: TestOptions.Regular9); 2018UsingDeclaration(text, options: TestOptions.Regular7_3, 2027UsingDeclaration(text, options: TestOptions.Regular8, 2036UsingDeclaration(text, options: TestOptions.Regular9, 2135UsingDeclaration(text, options: TestOptions.Regular9, 2215UsingDeclaration(text, options: TestOptions.Regular9, 2302UsingDeclaration(text, options: TestOptions.Regular9, 2396UsingDeclaration(text, options: TestOptions.Regular9, 2535UsingDeclaration(text, options: TestOptions.Regular7_3, 2550UsingDeclaration(text, options: TestOptions.Regular8, 2565UsingDeclaration(text, options: TestOptions.Regular9,

36UsingDeclaration("private", options: null, 155UsingDeclaration("class C { }", options: options); 173UsingDeclaration("void M() { }", options: options); 202UsingDeclaration("static int F1 = a, F2 = b;", options: options); 250UsingDeclaration("public ThisClassName(int x) : base(x) { }", options: options); 301UsingDeclaration("public ~ThisClassName() { }", options: options); 328UsingDeclaration("public implicit operator long(int x) => x;", options: options); 371UsingDeclaration("public int operator +(int x, int y) => x + y;", options: options); 430UsingDeclaration("C operator >>>(C x, C y) => x;", options: options); 481UsingDeclaration("C operator > >>(C x, C y) => x;", options: options, 564UsingDeclaration("C operator >> >(C x, C y) => x;", options: options, 647UsingDeclaration("C operator >>>=(C x, C y) => x;", options: options, 750UsingDeclaration("async Task<SomeNamespace.SomeType Method();", options: options, 798UsingDeclaration("public Task<SomeNamespace.SomeType Method();", options: options, 846UsingDeclaration("async Task<SomeNamespace. Method();", options: options, 889UsingDeclaration("public Task<SomeNamespace. Method();", options: options, 932UsingDeclaration("async Task<SomeNamespace.> Method();", options: options, 979UsingDeclaration("public Task<SomeNamespace.> Method();", options: options, 1026UsingDeclaration("string Property { get; init; }", options: options); 1060UsingDeclaration("string Property { init set; }", options: options, 1108UsingDeclaration("string Property { init; set; }", options: options); 1142UsingDeclaration("string Property { set; init; }", options: options); 1174UsingDeclaration("required string Prop { get; }", options: parseOptions); 1201UsingDeclaration("required Prop { get; }", options: parseOptions); 1226UsingDeclaration("required Prop { get; }", options: RequiredMembersOptions, 1249UsingDeclaration("required required { get; }", options: parseOptions); 1274UsingDeclaration("required required { get; }", options: RequiredMembersOptions, 1293UsingDeclaration("required required Prop { get; }", options: RequiredMembersOptions, 1316UsingDeclaration("required Type required { get; }", options: RequiredMembersOptions); 1343UsingDeclaration("required string Field;", options: parseOptions); 1367UsingDeclaration("required Field;", options: parseOptions); 1389UsingDeclaration("required Field;", options: RequiredMembersOptions, 1412UsingDeclaration("required required;", options: parseOptions); 1434UsingDeclaration("required required;", options: RequiredMembersOptions, 1455UsingDeclaration("required string M() {}", options: parseOptions); 1482UsingDeclaration("required M() {}", options: parseOptions); 1507UsingDeclaration("required M() {}", options: RequiredMembersOptions); 1531UsingDeclaration("static required C operator+(C c1, C c2) {}", options: parseOptions); 1578UsingDeclaration("static required implicit operator C(S s) {}", options: parseOptions); 1637UsingDeclaration(text, options: parseOptions, 1684UsingDeclaration("required string Prop { get;", options: parseOptions, 1715UsingDeclaration("required string Prop {", options: parseOptions, 1741UsingDeclaration("required string Prop", options: parseOptions, 1769UsingDeclaration("required string", options: parseOptions, 1789UsingDeclaration("required C", options: parseOptions, 1809UsingDeclaration("required", options: parseOptions, 1827UsingDeclaration("required", options: RequiredMembersOptions, 2323UsingDeclaration(text, options: options.WithLanguageVersion(version)); 2465UsingDeclaration(text, options: options.WithLanguageVersion(version), errors); 2589UsingDeclaration(text, options: options.WithLanguageVersion(version), errors); 2695UsingDeclaration(text, options: options.WithLanguageVersion(version), errors); 2801UsingDeclaration(text, options: options.WithLanguageVersion(version), errors); 2853UsingDeclaration("public int N::I::operator +(int x, int y) => x + y;", options: options.WithLanguageVersion(LanguageVersion.Preview), 2933UsingDeclaration("public int I::operator +(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview), 2988UsingDeclaration("public int I.operator +(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview)); 3039UsingDeclaration("public int I<T>.operator +(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview)); 3099UsingDeclaration("public int N1::N2::I.operator +(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview), 4090UsingDeclaration("public int I..operator +(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview), 4152UsingDeclaration("public int I . . operator +(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview), 4243UsingDeclaration(text, options: options.WithLanguageVersion(version)); 4377UsingDeclaration(text, options: options.WithLanguageVersion(version), errors); 4494UsingDeclaration(text, options: options.WithLanguageVersion(version), errors); 4593UsingDeclaration(text, options: options.WithLanguageVersion(version), errors); 4692UsingDeclaration(text, options: options.WithLanguageVersion(version), errors); 4743UsingDeclaration("int N::I::operator +(int x, int y) => x + y;", options: options.WithLanguageVersion(LanguageVersion.Preview), 4822UsingDeclaration("int I::operator +(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview), 4876UsingDeclaration("int I.operator +(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview)); 4926UsingDeclaration("int I<T>.operator +(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview)); 4985UsingDeclaration("int N1::N2::I.operator +(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview), 5935UsingDeclaration("int I..operator +(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview), 5996UsingDeclaration("int I . . operator +(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview), 6058UsingDeclaration("int N.I..operator +(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview), 6135UsingDeclaration("N.I.operator +(int x) => x;", options: options.WithLanguageVersion(version), errors); 6205UsingDeclaration("N.I. int(int x) => x;", options: options.WithLanguageVersion(version), errors); 6268UsingDeclaration(text, options: options.WithLanguageVersion(version)); 6368UsingDeclaration(text, options: options.WithLanguageVersion(version), errors); 6435UsingDeclaration("operator int(int x) => x;", options: options.WithLanguageVersion(version), errors); 6519UsingDeclaration(text, options: options.WithLanguageVersion(version), errors); 6619UsingDeclaration(text, options: options.WithLanguageVersion(version), errors); 6670UsingDeclaration("implicit N::I::operator int(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview), 6732UsingDeclaration("explicit I::operator int(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview), 6786UsingDeclaration("implicit I.operator int(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview)); 6836UsingDeclaration("explicit I<T>.operator int(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview)); 6895UsingDeclaration("implicit N1::N2::I.operator int(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview), 7788UsingDeclaration("explicit I..operator int(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview), 7849UsingDeclaration("implicit I . . operator int(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview), 7911UsingDeclaration("explicit I T(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview), 7968UsingDeclaration("explicit I.T(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview), 8022UsingDeclaration("explicit I.operator (int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview), 8076UsingDeclaration("explicit I.operator (int x) { return x; }", options: options.WithLanguageVersion(LanguageVersion.Preview), 8135UsingDeclaration("explicit I.operator (int x);", options: options.WithLanguageVersion(LanguageVersion.Preview), 8181UsingDeclaration("explicit I.T1 T2(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview), 8246UsingDeclaration("explicit I.operator (int x)", options: options.WithLanguageVersion(LanguageVersion.Preview), 8295UsingDeclaration("explicit I.operator (int x, );", options: options.WithLanguageVersion(LanguageVersion.Preview), 8356UsingDeclaration("explicit I.operator (int x, int y);", options: options.WithLanguageVersion(LanguageVersion.Preview), 8415UsingDeclaration("explicit I.operator var(x);", options: options.WithLanguageVersion(LanguageVersion.Preview), 8461UsingDeclaration("explicit I.operator (int x int y);", options: options.WithLanguageVersion(LanguageVersion.Preview), 8519UsingDeclaration("explicit N.I..operator int(int x) => x;", options: options.WithLanguageVersion(LanguageVersion.Preview), 8679UsingDeclaration("N1..N2 M(int x) => x;", options: TestOptions.Regular, 8737UsingDeclaration("int N1..M(int x) => x;", options: TestOptions.Regular, 8795UsingDeclaration("int N1.N2..M(int x) => x;", options: TestOptions.Regular, 8864UsingDeclaration("int N::I::M1() => 0;", options: options, 8918UsingDeclaration("int N1::N2::I.M1() => 0;", options: options, 8980UsingDeclaration("int N1::N2.I::M1() => 0;", options: options, 9042UsingDeclaration("int I::M1() => 0;", options: options, 9088UsingDeclaration("int N1::I.M1() => 0;", options: options); 9689UsingDeclaration("C I.operator checked " + op + "(C x) => x;", options: TestOptions.RegularPreview); 9820UsingDeclaration("C I.operator checked " + op + "(C x, C y) => x;", options: TestOptions.RegularPreview); 9921UsingDeclaration(op + " I.operator checked D(C x) => x;", options: TestOptions.RegularPreview); 10036UsingDeclaration("C I.operator unchecked " + op + "(C x, C y) => x;", options: TestOptions.RegularPreview, 12396UsingDeclaration("C operator " + op + "(C x) => x;", options); 12449UsingDeclaration("C operator checked " + op + "(C x) => x;", options); 12503UsingDeclaration("C I.operator " + op + "(C x) => x;", options); 12564UsingDeclaration("C I.operator checked " + op + "(C x) => x;", options); 12615UsingDeclaration("C operator > >=(C x) => x;", options, 12700UsingDeclaration("C operator >> =(C x) => x;", options, 12785UsingDeclaration("C operator > > =(C x) => x;", options, 12870UsingDeclaration("C operator > >>=(C x) => x;", options, 12955UsingDeclaration("C operator > > >=(C x) => x;", options, 13040UsingDeclaration("C operator > > > =(C x) => x;", options, 13125UsingDeclaration("C operator >> >=(C x) => x;", options, 13210UsingDeclaration("C operator >> > =(C x) => x;", options, 13295UsingDeclaration("C operator >>> =(C x) => x;", options, 13389UsingDeclaration("C operator " + op + " =(C x) => x;", options, 13485UsingDeclaration("C operator " + op + "(C x1, C x2) => x;", options, 13551UsingDeclaration("C operator " + op + "(C x1, C x2, C x3) => x;", options, 13626UsingDeclaration("C operator " + op + "() => x;", options, 13675UsingDeclaration("C operator unchecked " + op + "(C x) => x;", options, 13732UsingDeclaration("partial C operator " + op + "(C x) => x;", options, 13787UsingDeclaration("partial void operator " + op + "(C x) {}", options, 13814UsingDeclaration("partial C operator " + op + "() => x;", options, 13861UsingDeclaration("partial void operator " + op + "() {}", options, 13900UsingDeclaration(source, options, 14159UsingDeclaration(source, options, 14249UsingDeclaration(source, options, 14324UsingDeclaration(source, options, 14407UsingDeclaration(source, options, 14490UsingDeclaration(source, options, 14577UsingDeclaration(source, options, 14661UsingDeclaration(source, options, 14740UsingDeclaration(source, options, 14819UsingDeclaration(source, options, 14906UsingDeclaration(source, options, 14993UsingDeclaration(source, options, 15084UsingDeclaration(source, options, 15195UsingDeclaration(source, options, 15269UsingDeclaration(source, options, 15343UsingDeclaration(source, options, 15425UsingDeclaration(source, options, 15507UsingDeclaration(source, options, 15586UsingDeclaration(source, options, 15672UsingDeclaration(source, options, 15755UsingDeclaration(source, options, 15849UsingDeclaration(source, options, 15940UsingDeclaration(source, options, 16026UsingDeclaration(source, options, 16109UsingDeclaration(source, options, 16184UsingDeclaration(source, options, 16259UsingDeclaration(source, options, 16342UsingDeclaration(source, options, 16427UsingDeclaration(source, options, 16558UsingDeclaration(source, options, 16690UsingDeclaration(source, options, 16748UsingDeclaration(source, options, 16806UsingDeclaration(source, options, 16864UsingDeclaration(source, options, 16922UsingDeclaration(source, options, 17001UsingDeclaration(source, options, 17080UsingDeclaration(source, options, 17163UsingDeclaration(source, options, 17250UsingDeclaration(source, options, 17344UsingDeclaration(source, options, 17425UsingDeclaration(source, options, 17519UsingDeclaration(source, options, 17633UsingDeclaration(source, options, 17786UsingDeclaration(source, options, 17956UsingDeclaration(source, options, 18065UsingDeclaration(source, options, 18194UsingDeclaration(source, options, 18375UsingDeclaration(source, options, 18570UsingDeclaration(source, options, 18640UsingDeclaration(source, options, 18704UsingDeclaration(source, options, 18761UsingDeclaration(source, options, 18834UsingDeclaration(source, options, 19117UsingDeclaration(source, options, 19180UsingDeclaration(source, options, 19254UsingDeclaration(source, options, 19334UsingDeclaration(source, options, 19386UsingDeclaration(source, options, 19460UsingDeclaration(source, options, 19549UsingDeclaration(source, options, 19953UsingDeclaration(source, options, 20002UsingDeclaration(source, options, 20068UsingDeclaration(source, options, 20188UsingDeclaration(source, options, 20267UsingDeclaration(source, options, 20363UsingDeclaration(source, options, 20458UsingDeclaration(source, options, 20539UsingDeclaration(source, options, 20621UsingDeclaration(source, options, 20693UsingDeclaration(source, options,

99UsingDeclaration(""" 127UsingDeclaration(""" 160UsingDeclaration(""" 196UsingDeclaration(""" 237UsingDeclaration(""" 286UsingDeclaration(""" 322UsingDeclaration(""" 352UsingDeclaration(""" 381UsingDeclaration(""" 410UsingDeclaration(""" 442UsingDeclaration(""" 477UsingDeclaration(""" 521UsingDeclaration(""" 560UsingDeclaration(""" 599UsingDeclaration(""" 635UsingDeclaration(""" 805UsingDeclaration(""" 831UsingDeclaration(""" 860UsingDeclaration(""" 894UsingDeclaration(""" 920UsingDeclaration(""" 941UsingDeclaration(""" 963UsingDeclaration(""" 988UsingDeclaration(""" 1011UsingDeclaration(""" 1034UsingDeclaration(""" 1060UsingDeclaration(""" 1085UsingDeclaration("""

24UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(languageVersion)); 61UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(languageVersion)); 99UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(languageVersion), 135UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(languageVersion), 172UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(languageVersion)); 230UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(languageVersion)); 292UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(languageVersion), 352UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(languageVersion), 405UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(languageVersion)); 467UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(languageVersion)); 550UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(languageVersion), 653UsingDeclaration(source, TestOptions.Regular.WithLanguageVersion(languageVersion));

501UsingDeclaration(source, TestOptions.Regular11); 504UsingDeclaration(source, TestOptions.Regular12); 544UsingDeclaration(source, TestOptions.Regular11); 547UsingDeclaration(source, TestOptions.Regular12); 588UsingDeclaration(source, TestOptions.Regular11); 591UsingDeclaration(source, TestOptions.Regular12); 631UsingDeclaration(source, TestOptions.Regular11); 634UsingDeclaration(source, TestOptions.Regular12); 675UsingDeclaration(source, TestOptions.Regular11); 678UsingDeclaration(source, TestOptions.Regular12); 719UsingDeclaration(source, TestOptions.Regular11); 722UsingDeclaration(source, TestOptions.Regular12); 764UsingDeclaration(source, TestOptions.Regular11); 767UsingDeclaration(source, TestOptions.Regular12); 808UsingDeclaration(source, TestOptions.Regular11); 811UsingDeclaration(source, TestOptions.Regular12); 852UsingDeclaration(source, TestOptions.Regular11); 855UsingDeclaration(source, TestOptions.Regular12); 896UsingDeclaration(source, TestOptions.Regular11); 899UsingDeclaration(source, TestOptions.Regular12); 950UsingDeclaration(source, TestOptions.Regular11, expectedDiagnostics); 953UsingDeclaration(source, TestOptions.Regular12, expectedDiagnostics); 956UsingDeclaration(source, TestOptions.RegularPreview, expectedDiagnostics); 1012UsingDeclaration(source, TestOptions.Regular11, expectedDiagnostics); 1015UsingDeclaration(source, TestOptions.Regular12, expectedDiagnostics); 1018UsingDeclaration(source, TestOptions.RegularPreview, expectedDiagnostics); 1074UsingDeclaration(source, TestOptions.Regular11, expectedDiagnostics); 1077UsingDeclaration(source, TestOptions.Regular12, expectedDiagnostics); 1080UsingDeclaration(source, TestOptions.RegularPreview, expectedDiagnostics); 1135UsingDeclaration(source, TestOptions.Regular11, expectedDiagnostics); 1138UsingDeclaration(source, TestOptions.Regular12, expectedDiagnostics); 1141UsingDeclaration(source, TestOptions.RegularPreview, expectedDiagnostics); 1187UsingDeclaration(source, TestOptions.Regular11); 1190UsingDeclaration(source, TestOptions.Regular12); 1230UsingDeclaration(source, TestOptions.Regular11); 1233UsingDeclaration(source, TestOptions.Regular12); 1273UsingDeclaration(source, TestOptions.Regular11); 1276UsingDeclaration(source, TestOptions.Regular12); 1279UsingDeclaration(source, TestOptions.Regular9);

5815UsingDeclaration(""" 5909UsingDeclaration("""