{"record":{"id":"0018f0e9dc8eabf2","repo":"TheAlgorithms/C-Sharp","slug":"value-is-too-big-to-fit-into-int32","errorCode":null,"errorMessage":"Value is too big to fit into Int32","messagePattern":"Value is too big to fit into Int32","errorType":"exception","errorClass":"InvalidOperationException","httpStatus":null,"severity":"error","filePath":"DataStructures/BitArray.cs","lineNumber":697,"sourceCode":"        {\n            throw new InvalidOperationException(\"Value is too big to fit into Int64\");\n        }\n\n        var sequence = ToString();\n        return Convert.ToInt64(sequence, 2);\n    }\n\n    /// <summary>\n    ///     Returns a long integer representation of the bit-array.\n    ///     Assumes the bit-array length must been smaller or equal to 32 bit.\n    /// </summary>\n    /// <returns>integer array.</returns>\n    public int ToInt32()\n    {\n        // Precondition\n        if (field.Length > 32)\n        {\n            throw new InvalidOperationException(\"Value is too big to fit into Int32\");\n        }\n\n        var sequence = ToString();\n        return Convert.ToInt32(sequence, 2);\n    }\n\n    /// <summary>\n    ///     Sets all bits on false.\n    /// </summary>\n    public void ResetField()\n    {\n        for (var i = 0; i < field.Length; i++)\n        {\n            field[i] = false;\n        }\n    }\n\n    /// <summary>","sourceCodeStart":679,"sourceCodeEnd":715,"githubUrl":"https://github.com/TheAlgorithms/C-Sharp/blob/96e2905cab7bc6b33ac0a34ee5bb82ddccbcbb6c/DataStructures/BitArray.cs#L679-L715","documentation":"BitArray.ToInt32() converts the bit field to a 32-bit integer. Because an int holds at most 32 bits, the method validates field.Length <= 32 first; wider BitArrays cannot be represented as Int32 and it throws InvalidOperationException. Note that GetHashCode() calls ToInt32(), so hashing a >32-bit BitArray also triggers this error.","triggerScenarios":"Calling ToInt32() on a BitArray with field.Length > 32, or using a >32-bit BitArray as a dictionary/HashSet key (GetHashCode -> ToInt32 throws).","commonSituations":"Using large BitArrays (33–64 bits or more) in hashed collections; assuming symmetry with ToInt64's 64-bit limit when the field is between 33 and 64 bits.","solutions":["Only call ToInt32() when field.Length <= 32; verify length before converting.","For 33–64 bit fields use ToInt64() instead.","Split wider BitArrays into <=32-bit chunks and convert each.","Avoid using >32-bit BitArrays as hash keys, or override GetHashCode with a length-tolerant hash."],"exampleFix":"// before\nvar ba = new BitArray(new string('1', 40));\nint v = ba.ToInt32(); // throws\n\n// after\nvar ba = new BitArray(new string('1', 40));\nlong v = ba.ToInt64(); // fits within 64 bits","handlingStrategy":"validation","validationCode":"if (ba.field.Length > 32) throw new NotSupportedException(\"BitArray too wide for Int32\");","typeGuard":"bool CanConvertToInt32(BitArray ba) => ba.ToString().Length <= 32;","tryCatchPattern":"try { hash = ba.GetHashCode(); } catch (InvalidOperationException ex) when (ex.Message.Contains(\"Int32\")) { hash = ba.ToString().GetHashCode(); }","preventionTips":["Check field length before ToInt32/GetHashCode.","Use ToInt64 for 33-64 bit fields.","Never use >32-bit BitArrays as hash keys without a custom hash.","Prefer length-tolerant hashing (hash the string) for keyed collections."],"tags":["csharp","data-structures","bitarray","invalid-operation-exception"],"backgroundTag":"value-out-of-range","analyzedSha":"96e2905cab7bc6b33ac0a34ee5bb82ddccbcbb6c","analyzedAt":"2026-09-13T17:04:01.438Z","contentChangedAt":"2026-09-13T17:04:01.438Z","schemaVersion":2},"datasetVersion":"2026-09-16T04:17:20.429Z"}