What Causes IndexOutOfRangeException and ArgumentOutOfRangeException in C#?

InnexoutoFrangexception and ArgumentOutoFRANGEXCEPTION abnormality in In C#, when you try to access the array or collection project through indexing, if the index is invalid, you may encounter abnormalities. This means that the index is smaller than the lower boundary or greater than equal to the upper bound. In some cases, if the indexed interview exceeds the range of the collection, or uses functions such as

or IndexOutOfRangeException Essence

The timing of abnormal throwing FindIndex() GetOrdinal()

Using indexes beyond the effective range (for the array, usually 0 to length -1) access the array or set element. When using a multidimensional array, you need to check the length of each dimension, not just the total length.

The array will not grow dynamically, so trying to access elements exceeding its length will cause abnormalities.
The effective index range of the array can be changed under the custom.
If the array is empty and you try to access its elements, it will trigger
• .
• Incorrectly inconsistent indexing calculations in the invalid names may be triggered by incorrectly.
• IndexOutOfRangeException How to avoid
• IDataReader
Verify input parameters to ensure that they represent effective indexes.

Check the object status before using the index, especially when modifying data from external data sources. Verify the return value of functions such as or

to deal with the situation where the matching cannot be found.

• Using an assertion or code contract to ensure the immutable object and identify potential index errors during development.
How to debug
• IndexOf() FindIndex()
Check the code around the abnormal line to identify the array or collection of being accessible.
Check the value of the index variable to see if it is within the expected range.

If the index comes from the user input, please verify it thoroughly. If the index comes from the object state, check the validity of the state before the index calculation.

Use the debugger to gradually execute the code and observe the value calculated by the variable and index.

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