C# winforms cast childform as of it's own type -

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i have mdi project. i'm using form activeform = this.activemdichild;

however, instead of form, i'm like:

forms.lookup.grade activeform = (forms.lookup.grade) this.activemdichild; forms.lookup.product activeform = (forms.lookup.product) this.activemdichild;

...etc

so if forms.lookup.grade active want return activeform forms.lookup.grade

how can cast active form of it's own type in generic way instead of using switch this.activemdichild.name ?

thank mansi

you can check type @ runtime:

form activeform = this.activemdichild; if(activeform forms.lookup.grade) {   forms.lookup.grade gradeform = activeform forms.lookup.grade;   gradeform.somemethodofgrade();   .... }

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