Why Does Assigning a SQL `float` to a C# `float` Cause an `InvalidCastException`?

Type Mismatch: Understanding the Difference between SQL float and C# float

In C# programming, when attempting to assign a value from a SQL float datatype to a local float variable, you might encounter an InvalidCastException. This is because there is an inherent mismatch in the way these data types are represented in their respective systems.

A SQL float, as indicated in the documentation for SqlDbType, is equivalent to a C# double. This means that the precision and range of values that can be stored in a SQL float are greater than those of a C# float.

To resolve the casting issue, you must convert the SQL float value to double explicitly before assigning it to the C# float variable. This can be achieved using the following code:

_AccelLimit = (float)(double)exercise["DefaultAccelLimit"];

By casting the SQL float value to a double, you effectively increase its precision and range to match that of a C# float. This ensures that the assignment can be performed without any data loss or conversion errors.

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