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How Do I Avoid Null Returns When Converting Strings to Types in C#?

Jan 23, 2025 pm 02:35 PM

How Do I Avoid Null Returns When Converting Strings to Types in C#?

C# String to Type Conversion: Avoiding Null Returns

Converting strings representing class names into actual types in C# can sometimes yield null results. This commonly occurs when using Type.GetType("System.Int32"), which only functions correctly for types within mscorlib or the current assembly.

To successfully convert your custom types, you must specify both the namespace and the assembly:

Type type = Type.GetType("Namespace.MyClass, MyAssembly");
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For strongly-named assemblies, ensure you include all relevant assembly information as detailed in the Type.GetType(string) documentation.

Alternatively, if you have a reference to the assembly, use Assembly.GetType():

Assembly asm = typeof(SomeKnownType).Assembly;
Type type = asm.GetType(namespaceQualifiedTypeName);
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These methods provide reliable string-to-type conversion in diverse situations.

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