Filter Id Title Severity RCS1001 Add braces (when expression spans over multiple lines). Info RCS1002 Remove braces. None RCS1003 Add braces to if-else (when expression spans over multiple lines). Info RCS1004 Remove braces from if-else. None RCS1005 Simplify nested using statement. Hidden RCS1006 Merge 'else' with nested 'if'. Hidden RCS1007 Add braces. None RCS1008 Use explicit type instead of 'var' (when the type is not obvious). None RCS1009 Use explicit type instead of 'var' (foreach variable). None RCS1010 Use 'var' instead of explicit type (when the type is obvious). None RCS1012 Use explicit type instead of 'var' (when the type is obvious). None RCS1013 Use predefined type. None RCS1014 Use explicitly typed array (or vice versa). None RCS1015 Use nameof operator. Info RCS1016 Convert block body to expression-body (or vice versa). None RCS1017 [deprecated] Avoid multiline expression body. None RCS1018 Add accessibility modifiers (or vice versa). Info RCS1019 Order modifiers. None RCS1020 Simplify Nullable<T> to T?. Info RCS1021 Convert lambda expression body to expression-body. Info RCS1031 Remove unnecessary braces. Hidden RCS1032 Remove redundant parentheses. Info RCS1033 Remove redundant boolean literal. Info RCS1034 Remove redundant 'sealed' modifier. Hidden RCS1035 Remove redundant comma in initializer. None RCS1036 Remove redundant empty line. Info RCS1037 Remove trailing white-space. Info RCS1038 Remove empty statement. Info RCS1039 Remove argument list from attribute. Hidden RCS1040 Remove empty 'else' clause. Hidden RCS1041 Remove empty initializer. Info RCS1042 Remove enum default underlying type. Hidden RCS1043 Remove 'partial' modifier from type with a single part. Hidden RCS1044 Remove original exception from throw statement. Warning RCS1045 Rename private field to camel case with underscore. None RCS1046 Asynchronous method name should end with 'Async'. None RCS1047 Non-asynchronous method name should not end with 'Async'. Info RCS1048 Use lambda expression instead of anonymous method. Info RCS1049 Simplify boolean comparison. Info RCS1050 Add argument list to object creation expression (or vice versa). None RCS1051 Parenthesize condition of conditional expression. None RCS1052 Declare each attribute separately. None RCS1055 Avoid semicolon at the end of declaration. Hidden RCS1056 Avoid usage of using alias directive. None RCS1058 Use compound assignment. Info RCS1059 Avoid locking on publicly accessible instance. Warning RCS1060 Declare each type in separate file. None RCS1061 Merge 'if' with nested 'if'. Hidden RCS1063 Avoid usage of do statement to create an infinite loop. Info RCS1064 Avoid usage of for statement to create an infinite loop. None RCS1065 Avoid usage of while statement to create an infinite loop. None RCS1066 Remove empty 'finally' clause. Hidden RCS1068 Simplify logical negation. Info RCS1069 Remove unnecessary case label. Hidden RCS1070 Remove redundant default switch section. Hidden RCS1071 Remove redundant base constructor call. Hidden RCS1072 Remove empty namespace declaration. Info RCS1073 Convert 'if' to 'return' statement. Info RCS1074 Remove redundant constructor. Hidden RCS1075 Avoid empty catch clause that catches System.Exception. Warning RCS1077 Optimize LINQ method call. Info RCS1078 Use "" instead of string.Empty (or vice versa). None RCS1079 Throwing of new NotImplementedException. Info RCS1080 Use 'Count/Length' property instead of 'Any' method. Info RCS1081 Split variable declaration. None RCS1084 Use coalesce expression instead of conditional expression. Info RCS1085 Use auto-implemented property. Info RCS1089 Use --/++ operator instead of assignment. Info RCS1090 Add call to 'ConfigureAwait' (or vice versa). Info RCS1091 Remove empty region. Hidden RCS1093 Remove file with no code. Info RCS1094 Declare using directive on top level. None RCS1096 Convert 'HasFlag' call to bitwise operation (or vice versa). Info RCS1097 Remove redundant 'ToString' call. Info RCS1098 Constant values should be placed on right side of comparisons. Info RCS1099 Default label should be the last label in a switch section. Info RCS1100 Format documentation summary on a single line. None RCS1101 Format documentation summary on multiple lines. None RCS1102 Make class static. Warning RCS1103 Convert 'if' to assignment. Info RCS1104 Simplify conditional expression. Info RCS1105 Unnecessary interpolation. Info RCS1106 Remove empty destructor. Info RCS1107 Remove redundant 'ToCharArray' call. Info RCS1108 Add 'static' modifier to all partial class declarations. Info RCS1110 Declare type inside namespace. Info RCS1111 Add braces to switch section with multiple statements. None RCS1112 Combine 'Enumerable.Where' method chain. Info RCS1113 Use 'string.IsNullOrEmpty' method. Info RCS1114 Remove redundant delegate creation. Info RCS1118 Mark local variable as const. Info RCS1123 Add parentheses when necessary. Info RCS1124 Inline local variable. Hidden RCS1126 Add braces to if-else. None RCS1128 Use coalesce expression. Info RCS1129 Remove redundant field initialization. Hidden RCS1130 Bitwise operation on enum without Flags attribute. Info RCS1132 Remove redundant overriding member. Info RCS1133 Remove redundant Dispose/Close call. Hidden RCS1134 Remove redundant statement. Hidden RCS1135 Declare enum member with zero value (when enum has FlagsAttribute). Info RCS1136 Merge switch sections with equivalent content. Hidden RCS1138 Add summary to documentation comment. Warning RCS1139 Add summary element to documentation comment. Warning RCS1140 Add exception to documentation comment. Hidden RCS1141 Add 'param' element to documentation comment. Hidden RCS1142 Add 'typeparam' element to documentation comment. Hidden RCS1143 Simplify coalesce expression. Hidden RCS1145 Remove redundant 'as' operator. Hidden RCS1146 Use conditional access. Info RCS1151 Remove redundant cast. Hidden RCS1154 Sort enum members. Info RCS1155 Use StringComparison when comparing strings. Warning RCS1156 Use string.Length instead of comparison with empty string. Info RCS1157 Composite enum value contains undefined flag. Info RCS1158 Static member in generic type should use a type parameter. Info RCS1159 Use EventHandler<T>. Info RCS1160 Abstract type should not have public constructors. Info RCS1161 Enum should declare explicit values. Hidden RCS1162 Avoid chain of assignments. None RCS1163 Unused parameter. Info RCS1164 Unused type parameter. Info RCS1165 Unconstrained type parameter checked for null. Hidden RCS1166 Value type object is never equal to null. Info RCS1168 Parameter name differs from base name. Hidden RCS1169 Make field read-only. Info RCS1170 Use read-only auto-implemented property. Info RCS1171 Simplify lazy initialization. Info RCS1172 Use 'is' operator instead of 'as' operator. Warning RCS1173 Use coalesce expression instead of 'if'. Info RCS1174 Remove redundant async/await. None RCS1175 Unused this parameter. Info RCS1176 Use 'var' instead of explicit type (when the type is not obvious). None RCS1177 Use 'var' instead of explicit type (in foreach). None RCS1179 Unnecessary assignment. Info RCS1180 Inline lazy initialization. Info RCS1181 Convert comment to documentation comment. Hidden RCS1182 Remove redundant base interface. Hidden RCS1186 Use Regex instance instead of static method. Hidden RCS1187 Use constant instead of field. Info RCS1188 Remove redundant auto-property initialization. Hidden RCS1189 Add or remove region name. Hidden RCS1190 Join string expressions. Info RCS1191 Declare enum value as combination of names. Info RCS1192 Unnecessary usage of verbatim string literal. Info RCS1193 Overriding member should not change 'params' modifier. Warning RCS1194 Implement exception constructors. Warning RCS1195 Use ^ operator. Info RCS1196 Call extension method as instance method. Info RCS1197 Optimize StringBuilder.Append/AppendLine call. Info RCS1198 Avoid unnecessary boxing of value type. None RCS1199 Unnecessary null check. Info RCS1200 Call 'Enumerable.ThenBy' instead of 'Enumerable.OrderBy'. Info RCS1201 Use method chaining. Hidden RCS1202 Avoid NullReferenceException. Info RCS1203 Use AttributeUsageAttribute. Warning RCS1204 Use EventArgs.Empty. Info RCS1205 Order named arguments according to the order of parameters. Info RCS1206 Use conditional access instead of conditional expression. Info RCS1207 Convert anonymous function to method group (or vice versa). None RCS1208 Reduce 'if' nesting. None RCS1209 Order type parameter constraints. Info RCS1210 Return completed task instead of returning null. Warning RCS1211 Remove unnecessary 'else'. Hidden RCS1212 Remove redundant assignment. Info RCS1213 Remove unused member declaration. Info RCS1214 Unnecessary interpolated string. Info RCS1215 Expression is always equal to true/false. Warning RCS1216 Unnecessary unsafe context. Info RCS1217 Convert interpolated string to concatenation. Hidden RCS1218 Simplify code branching. Info RCS1220 Use pattern matching instead of combination of 'is' operator and cast operator. Info RCS1221 Use pattern matching instead of combination of 'as' operator and null check. Info RCS1222 Merge preprocessor directives. Info RCS1223 Mark publicly visible type with DebuggerDisplay attribute. None RCS1224 Make method an extension method. Info RCS1225 Make class sealed. Info RCS1226 Add paragraph to documentation comment. Info RCS1227 Validate arguments correctly. Info RCS1228 Unused element in documentation comment. Hidden RCS1229 Use async/await when necessary. Info RCS1230 Unnecessary explicit use of enumerator. Info RCS1231 Make parameter ref read-only. None RCS1232 Order elements in documentation comment. Info RCS1233 Use short-circuiting operator. Info RCS1234 Duplicate enum value. Info RCS1235 Optimize method call. Info RCS1236 Use exception filter. Info RCS1237 Use bit shift operator. Hidden RCS1238 Avoid nested ?: operators. Hidden RCS1239 Use 'for' statement instead of 'while' statement. Info RCS1240 Operator is unnecessary. Info RCS1241 Implement non-generic counterpart. Hidden RCS1242 Do not pass non-read-only struct by read-only reference. Warning RCS1243 Duplicate word in a comment. Info RCS1244 Simplify 'default' expression. Hidden RCS1246 Use element access. Info RCS1247 Fix documentation comment tag. Info RCS1248 Use pattern matching to check for null (or vice versa). None